GE Becker VRP-B-CH Series User manual

GE Oil & Gas
Becker*
VRP-B-CH Series
Valve Regulator Pilots
Instruction Manual
GE Data Classification : Public

b | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | c
© 2016 General Electric Company. All rights reserved.
THESE INSTRUCTIONS PROVIDE THE CUSTOMER/OPERATOR WITH IMPORTANT PROJECT-SPECIFIC
REFERENCE INFORMATION IN ADDITION TO THE CUSTOMER/OPERATOR’S NORMAL OPERATION
AND MAINTENANCE PROCEDURES. SINCE OPERATION AND MAINTENANCE PHILOSOPHIES VARY,
GE (GENERAL ELECTRIC COMPANY AND ITS SUBSIDIARIES AND AFFILIATES) DOES NOT ATTEMPT TO
DICTATE SPECIFIC PROCEDURES, BUT TO PROVIDE BASIC LIMITATIONS AND REQUIREMENTS CREATED
BY THE TYPE OF EQUIPMENT PROVIDED.
THESE INSTRUCTIONS ASSUME THAT OPERATORS ALREADY HAVE A GENERAL UNDERSTANDING OF THE
REQUIREMENTS FOR SAFE OPERATION OF MECHANICAL AND ELECTRICAL EQUIPMENT IN POTENTIALLY
HAZARDOUS ENVIRONMENTS. THEREFORE, THESE INSTRUCTIONS SHOULD BE INTERPRETED AND
APPLIED IN CONJUNCTION WITH THE SAFETY RULES AND REGULATIONS APPLICABLE AT THE SITE
AND THE PARTICULAR REQUIREMENTS FOR OPERATION OF OTHER EQUIPMENT AT THE SITE.
THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS IN EQUIPMENT NOR
TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONNECTION WITH INSTALLATION,
OPERATION OR MAINTENANCE. SHOULD FURTHER INFORMATION BE DESIRED OR SHOULD PARTICULAR
PROBLEMS ARISE WHICH ARE NOT COVERED SUFFICIENTLY FOR THE CUSTOMER/OPERATOR’S
PURPOSES THE MATTER SHOULD BE REFERRED TO GE.
THE RIGHTS, OBLIGATIONS AND LIABILITIES OF GE AND THE CUSTOMER/OPERATOR ARE STRICTLY
LIMITED TO THOSE EXPRESSLY PROVIDED IN THE CONTRACT RELATING TO THE SUPPLY OF THE
EQUIPMENT. NO ADDITIONAL REPRESENTATIONS OR WARRANTIES BY GE REGARDING THE EQUIPMENT
OR ITS USE ARE GIVEN OR IMPLIED BY THE ISSUE OF THESE INSTRUCTIONS.
THESE INSTRUCTIONS ARE FURNISHED TO THE CUSTOMER/OPERATOR SOLELY TO ASSIST IN THE
INSTALLATION, TESTING, OPERATION, AND/OR MAINTENANCE OF THE EQUIPMENT DESCRIBED. THIS
DOCUMENT SHALL NOT BE REPRODUCED IN WHOLE OR IN PART WITHOUT THE WRITTEN APPROVAL
OF GE.

1 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
Introduction
GE’s Becker VRP-B-CH series balanced seat design, double-
acting pilot represents a breakthrough in valve control technology
for the natural gas industry. Built to exacting specifications,
this easily maintained unit offers highly accurate control
characteristics over a wide range of operating environments.
When in control, in a steady state, the VRP-B-CH series pilots have
a very low gas consumption rate to minimize fugitive emissions.
Furthermore, the VRP-B-CH pilots are designed to allow bleed
gas to be routed to a lower pressure system, or downstream,
for complete elimination of bleed gas. The elimination of this
expensive bleed gas ultimately saves a significant amount of
money for the operating company and reduces the environmental
impact of atmospheric hydrocarbons and diminishing natural
resources.
Description
The Becker VRP-B-CH balanced seat, double-acting pilot
provides pressure control when utilized with a double-acting
piston actuated control valve. The VRP-B-CH measures
downstream sensing pressure and positions the double-acting
actuator to maintain the desired downstream pressure. The
VRP-B-CH pilot may be used for pressure control applications with
setpoints ranging from 3 psig to 1500 psig. The Becker CH pilot
design represents GE’s commitment to continually develop new
products and update existing ones to increase their performance
while retaining simple operation and low maintenance.
Technical Assistance
Should you have any questions, please contact your local
GE sales representative or technical assistance at:
GE Oil & Gas
Attn : Becker Control Valves Technical Assistance
12970 Normandy Boulevard
Jacksonville, FL 32221
USA
Tel. +1-844-VALVE-GE
www.geoilandgas.com/valves
Page
Introduction................................................................................................................................................ 1
Description ....................................................................................................................................................................1
Technical Assistance ................................................................................................................................................1
Scope of Manual.........................................................................................................................................................2
Advantages of the Combination Chamber VRP-B-CH Pilot Controllers...........................................2
Applications ..................................................................................................................................................................2
Technical Information............................................................................................................................... 3
Technical Specifications..........................................................................................................................................3
Materials of Construction.......................................................................................................................................3
Model Number Explanation ..................................................................................................................................3
Identification Tag........................................................................................................................................................3
Remote Setpoint Change Options......................................................................................................................4
Principles of Operation............................................................................................................................. 5
Adjustment Procedures............................................................................................................................ 6
Initial Adjustment .......................................................................................................................................................6
Fine Tuning Procedures...........................................................................................................................................7
Troubleshooting..........................................................................................................................................................8
Inspection Procedure ...............................................................................................................................................8
Annual Maintenance Checklist............................................................................................................................9
Parts Ordering............................................................................................................................................ 9
Seal Kits ..........................................................................................................................................................................9
VRP-B-CH Pilot Blank without Bottom Cartridge Parts......................................................................... 12
VRP-B-CH Pilot Spring Chamber Parts.......................................................................................................... 13
Appendix.................................................................................................................................................... 14
Flow Calculations.................................................................................................................................................... 14
Accessories ............................................................................................................................................... 15
SP Series Set Point Change Pump:.................................................................................................................. 15
Remote Set Point Module:................................................................................................................................... 15
AB Series Atmospheric Bleed Control:........................................................................................................... 15
NBV Series No Bleed Valve:................................................................................................................................ 15
DPS-2 Series Sensor Adjustments................................................................................................................... 15
DPS Series Non-Bleed Sensor: .......................................................................................................................... 15
Assembly Procedures ............................................................................................................................. 16
Orifice Block Assembly ......................................................................................................................................... 17
175-CH Chamber Assemblies ........................................................................................................................... 25
175-CH Chamber Assemblies (Cont.) ............................................................................................................ 26
600-CH Chamber Assemblies ........................................................................................................................... 27
600-CH Chamber Assemblies (Contd.).......................................................................................................... 28
1000/1500-CH Chamber Assemblies (Contd.)........................................................................................... 29
1000/1500-CH Chamber Assemblies (Contd.)........................................................................................... 30
Control Spring Assembly...................................................................................................................................... 31
175/600-CH Cap Assembly ............................................................................................................................... 32
List of recommended tools................................................................................................................................. 29
Parts Silhouettes...................................................................................................................................................... 30
Table of Contents

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 2
© 2016 General Electric Company. All rights reserved.
Scope of Manual
This manual provides information on the installation, operation,
adjustment, and maintenance of the Becker VRP-B-CH double-
acting pilot. For information concerning actuators, valves, and
accessories, refer to the instruction manuals provided with the
specific product.
Note: Only those qualified through training or experience
should install, operate, or maintain Becker pilots. If there are any
questions concerning these instructions, contact your GE sales
representative or sales office before proceeding.
Advantages of the Combination
Chamber VRP-B-CH Pilot Controllers
1. The Spring is protected against corrosion caused by exposure
to the outside weather conditions and condensation.
2. Small net force will be transferred to the pilot body resulting in
negligible dead band shift when changing setpoint.
3. Because the need for a flat diaphragm for some pilot models
is eliminated, only 5 pilot model numbers are needed, instead
of 11, and there is less troubleshooting during assembly.
4. The VRP-B-CH pilots will have only 3 diaphragms (as opposed
to 5).
5. Larger measured variable chamber volume and surface area
dampens control pressure signal, helping to compensate for
vibration induced by poor location of sensing tap in area of
flow pulsation and turbulence.
6. Number of fittings and tubing is minimized with “manifold”
body design.
7. Sensing gauge is brought up to eye level.
8. Control springs can be replaced without disturbing
any diaphragms.
9. Springs are guided by the outside resulting in less likelihood
of friction from poorly aligned spring.
10. The accuracy of pilots is guaranteed to be ±3/4 percent.
Applications
• Primary pressure control
• Overpressure protection (monitor)
• Underpressure protection (standby)
• Relief valve
• Backpressure control
• Unique “Bleed to Pressure System” BPS*
(when feature can be utilized)
• Any large downstream systems (city gate stations,
inter-system pressure limiting)
• Suction control to reciprocating compressors(1)
Guidelines for Usage
Large downstream systems:
City gate stations, inter-system pressure limiting, overpressure
protection for custody transfer stations, and mainline relief valve
applications are all suited to this pilot.
No “Low” pressure available:
The low steady state consumption of the pilot makes it a first
choice for any pressure control application covered above in
which the downstream pressure exceeds 300 psig and there
are no alternative pipeline systems nearby operating below
300 psig as well. Without a system to “dump” the pilot bleed gas,
the VRP-B-CH makes an exceptional choice since it bleeds
<10 scfh while in control at steady state.
The Becker BPS* Bleed to a pressure system:
When adjusted to bleed to a pressure system, the VRP-B-CH
sensitivity is set up to open the internal balance valves for further
control accuracy. This adjustment places the gas consumption
rate of the VRP-B-CH pilot equal to that of the VRP-CH pilot.
Compatible Actuators:
• Becker RPDA Actuators (Rotary Piston Double-Acting)
• Becker LPDA Actuators (Linear Piston Double-Acting)
• Other manufacturer’s double-acting piston actuators(1)
Retrofit Compatibility:
Optimum performance is achieved by pairing the VRP-B-CH
with genuine Becker control valve actuators. Should you already
have existing control valve actuator(s) in service, the addition of a
VRP-B-CH can improve performance and minimize atmospheric
bleed emissions.
Some compatible actuators:
• Bettis T-Series piston actuators
• Rotork Series XX actuators
• Fisher Type 470 piston actuators
• Fisher Type 1061 piston
(1) Consult GE for additional information.

3 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
Technical Information
Technical Specifications
Steady State Gas
Consumption
<10 scfh when bleeding to atmosphere
When bleeding downstream, see
consumption table in Appendix
Supply Gas Dry, filtered (100 micron) gas
Maximum Flow Capacity 850 scfh (24 scmh)
Maximum Supply Pressure 400 psig (2758 kPa)
Maximum Supply –
Discharge Differential
150 psig (1034 kPa)
Minimum Supply –
Discharge Differential
50 psig (348 kPa)
Operative Ambient
Temperature Range
-20°F to 160°F
(-29°C to 71°C)
Approximate Weight 12 pounds (5.4 kg)
Minimum Deadband 0.2% instrument signal
Control Accuracy ± 0.75% of setpoint
Maximum Sensing Pressure 1500 psig
Setpoint Range 3 psig – 1500 psig
21 kPa – 10342 kPa
Housing Meets NEMA 3 classification
Installation Orientation Vertical position recommended
• Custom bracket supplied with
Becker Actuators
•2-in pipe mount provided for retrofit to
other manufacturers’ actuators
Materials of Construction
External Parts AL 2024 Anodized Aluminium/316
Stainless Steel
Internal Parts 316 Stainless Steel/2024 Anodized Aluminum
Springs Plated steel
Diaphragms Buna-N with nylon reinforcement
Seats and O-Rings Buna-N
Tubing and
Tubing Fittings
316 Stainless Steel
Gauges 2-1/2 inch dial liquid filled brass connection w/
stainless steel case(1)
(standard issue with units of psig dual units of
psig/kPa available).
(1) Consult GE for additional information.
Model Number Explanation
• The VRP-B-CH pilot is available in four different models to
cover sensing pressures from 3 psig to 1500 psig.
• The number expressed in the VRP model designation is the
maximum sensing pressure (for example, a VRP-B-600-CH
has a maximum sensing pressure of 600 psig).
Identification Tag
Each unit has a stainless steel control tag fastened under one of
the bolts of the spring cartridge. The range of the control spring
is stamped on the face side of the tag. The shipping date and
seven-character part number are stamped on the bottom side
of the tag. The letter after the seven-digit part number identify
the pilot revision series.
VRP-B-175-CH VRP-B-600-CH
VRP-B-CH pilots – model numbers
VRP-B-1000-CH VRP-B-1500-CH

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 4
© 2016 General Electric Company. All rights reserved.
Remote Setpoint Change Options
• The SM-1000 series motors accept a 24 VDC or 120 VAC input.
The SM-1100 series motors accept a 4-20 MA signal and
require a separate 24 VDC or 120 VAC power connection.
• The total motor rotation is adjustable. The maximum number
of motor rotations possible coupled with the spring rate
determines the total setpoint range.
VRP-B-CH Pilot Selection Chart
Model Number Control Range
(psig/kPa)
Spring Color
(Part Number)
Setpoint Change per
Revolution of
Setpoint Screw
Setpoint Range
Discrete Remote
Control (SM-1100)
Setpoint Range
Analog (4-20 mA)
Remote Control
(SM-1000)
VRP-B-175-CH(1)
3 - 10 psig
20 - 69 kPa
Gold
(25-8236)
0.57 psig
3.9 kPa
3.1 psig
21 kPa
9 psig
62.1 kPa
7 - 30 psig
48 - 207 kPa
Beige
(25-8238)
2.0 psig
13.7 kPa
11 psig
75.8 kPa
23 psig
159 kPa
15 - 50 psig
103 - 345 kPa
Burgundy
(25-8239)
3.0 psig
21 kPa
16.5 psig
114 kPa
35 psig
241 kPa
20 - 85 psig
138 - 596 kPa
Pink
(25-8240)
6.4 psig
44 kPa
35.2 psig
243 kPa
65 psig
448 kPa
50 - 175 psig
345 - 1207 kPa
Yellow
(25-1306)
23 psig
157 kPa
125 psig
862 kPa
125 psig
862 kPa
VRP-B-600-CH
5 - 40 psig
34 - 276 kPa
Gold
(25-8236)
2.1 psig
14.6 kPa
11.5 psig
79 kPa
35 psig
241 kPa
25 - 140 psig
172 - 965 kPa
Beige
(25-8238)
7.4 psig
51 kPa
41 psig
283 kPa
115 psig
793 kPa
50 - 175 psig
345 - 1207 kPa
Burgundy
(25-8239)
11.3 psig
78 kPa
62 psig
427 kPa
125 psig
862 kPa
135 - 300 psig
931 - 2069 kPa
Pink
(25-8240)
24 psig
164 kPa
132 psig
910 kPa
165 psig
1138 kPa
275 - 600 psig
1896 - 4137 kPa
Yellow
(25-1306)
85 psig
586 kPa
425 psig
2930 kPa
425 psig
2930 kPa
VRP-B-1000-CH 550 - 1000 psig
3792 - 6895 kPa
Yellow
(25-1306)
143 psig
990 kPa
700 psig
4826 kPa
700 psig
4826 kPa
VRP-B-1500 -CH 800 - 1300 psig
5516 - 8964 kPa
Grey
(25-1562)
227 psig
1565 kPa
850 psig
5860 kPa
850 psig
5860 kPa
900 - 1500 psig
6205 - 10342kPa
Violet
(25-8073)
276 psig
1903 kPa
950 psig
6550 kPa
950 psig
6550 kPa
(1) These models should only be used for applications that require high gain. Consult GE prior to selecting these models.

5 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
Principles of Operation
GE’s Becker VRP-B-CH pilot and double-acting cylinder
actuator can be used in conjunction with varying valve types to
provide a complete package for stable, accurate pressure control
over a wide range of applications. The energy for control valve
operation comes from the pressure differential between the pilot
supply and discharge pressures.
The power gas channels through two adjustable orifices which
feed the top and the bottom portion of the cylinder independently.
Both sides of the actuating cylinder are under full power gas
pressure at steady state since both balanced valves are closed.
When the sensing pressure resides within the pilot deadband
region, bleed gas is virtually eliminated. The pilot therefore
operates on the design concept of a deadband within which a
non-bleeding, force-balanced state is achieved. Deadband can
be defined as the amount of change necessary in the sensing
pressure to the pilot to create a change in the output pressure to
the cylinder.
When the control pressure rises above the set point, the pilot
pistons move downward. As the top inside piston unloads the
cylinder top balance valve, the bottom piston moves away from
the balance valve plunger and maintains pressure on the bottom
of the actuator cylinder. This causes an increase in cylinder
bottom pressure and a decrease in cylinder top pressure.
The pressure differential creates the force needed to close the
valve and lessen the flow of gas. When the control pressure
returns to the setpoint, the pilot output pressures automatically
return to power gas at the new valve position.
If the control pressure falls below the setpoint, the opposite
reaction takes place.
The deadband region can be increased and decreased with the
pilot’s sensitivity adjustment drum. Increasing the deadband
increases the pilot’s error in controlling setpoint. Decreasing the
deadband reduces the error, with the tradeoff of increasing bleed
gas. Therefore, deadband is adjusted to produce an adequate
pilot response to a small change in sensing pressure, while
producing the minimum amount of bleed gas while the pilot
is in a steady state.
The variable orifices provide tuning of the stroking speed of the
actuator. Increasing the variable orifice number increases the
stroking speed. The two separate orifices allow tuning in both
directions to match the pilot response to a wide variety of valves
and operating systems.
Figure 1a - VRP-B-CH Pilot principles of operation
Figure 1b - VRP-B-CH Pilot principles of operation
Figure 1c - VRP-B-CH Pilot principles of operation

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 6
© 2016 General Electric Company. All rights reserved.
Adjustment Procedures
Your VRP-B-CH pilot will come factory adjusted for your
particular application. The use of the adjustment procedures will
be necessary upon installation of a rubber goods replacement
kit or any other disassembly or reassembly of the pilot.
The sensitivity adjustment drum in the center of the pilot
determines the sensitivity of the unit.
The setpoint adjustment screw determines the setpoint at which
the pilot operates. The variable orifices determine the response
speed of the pilot.
Initial Adjustment
1. Adjust the supply regulator
Adjust the supply regulator to the desired power gas pressure.
Refer to the original invoice paperwork supplied with the
product for the appropriate power gas pressure setting. It is
imperative that adequate supply gas pressure be supplied
to the VRP-B-CH in order to ensure proper operation of the
system and all accessories.
2. Adjust the adjustable orifices
The adjustable orifices are used to control the volume of gas
that is supplied to the VRP-B-CH. The stroking speed of the
system is proportional to the numerical value of the adjustable
orifice. Adjustable orifice settings are typically equal for both
orifices. However, a few applications may require unequal
settings for each adjustable orifice. Set both orifices according
to the table A below if pilot bleeds to atmosphere and table B
if pilot bleeds to pressure system.
Notes:
• To determine the cylinder bore, look at the model number
stamped on the stainless steel tag on the top of the cylinder.
The cylinder bore will be the first number following the first
capital letter “H”. This one or two digit number following the
first “H” will be the diameter in inches and will be followed
by another letter (for example, a unit with the model number
6H8F6FG-PCH has an 8-in. bore).
• If equipped with a DPS sensor and/or AB-control, see page 20.
3. Disable DPS-2 series non bleed sensor (if equipped):
The DPS-2 non bleed sensor should be disabled prior to
commencing initial adjustment procedures. Failure to disable
the DPS non bleed sensor may prevent initial adjustments
from being completed properly. To disable the DPS-2 series
non bleed sensor(s) rotate the adjustment screw of the DPS-2
until it extends approximately 1.75-in from the top surface of
the DPS-2 spring cartridge.
4. Disable AB series atmospheric bleed control (if equipped):
The AB series atmospheric bleed control should be disabled
prior to commencing initial adjustment procedures. Failure to
disable the AB control may prevent initial adjustments from
being completed properly. To disable the AB control rotate the
adjustment screw of the AB control until it disengages. Then,
tighten the nut on the AB sensor adjustment screw to seal
threads on the cap
5. Close cylinder block valves:
Closing the cylinder block valves will isolate the VRP-B-CH
from the control valve actuator. This prevents unintended
stroking of the control valve and simplifies setting the
VRP-B-CH.
6. Close the valve on the sensing line:
It is imperative that a full-sealing valve be installed as close to
the sensing port of the VRP-B-CH as possible. The volume of
gas between the VRP-B-CH sensing port and the block valve
on the sensing line should be minimized. It is also imperative
that the fittings between the VRP-B-CH sensing port and the
sensing line block valve be bubble tight in order to facilitate
adjustment. It is recommended that a quarter-turn (locking)
ball valve be utilized to isolate the VRP-B-CH sensing line.
Confirm that the VRP-B-CH exhaust (discharge) line is open.
The discharge line is connected to the port marked “EX”.
Should flow from the exhaust port be blocked, adjustment
of the VRP-B-CH will not be possible.
Table A – Exhaust Vented to Atmosphere
Supply
Pressure
(psig)
Cylinder Bore (In.)
456810 12 14
Variable Orifice Number
Up to 50 3334456
51-200 2233455
201-600 2223345
Table B – Exhaust Vented to Pressure System
Supply
Pressure
(psig)
Cylinder Bore (In.)
456810 12 14
Variable Orifice Number
Up to 50 3334456
51-200 4445566
201-600 2223345

7 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
7. Initialize the sensitivity adjustment:
Turn the sensitivity adjustment drum to the left (increasing
numbers on the scale) as far as it will turn. Then turn it one
(1) complete rotation to the right (decreasing numbers on the
scale).
8. Apply a “False Signal” to the sensing port of the VRP-B-CH:
The “False Signal” pressure should be equivalent to the
desired setpoint pressure. Refer to the original invoice
paperwork supplied with the product for the appropriate
setpoint pressure setting. If the adequate gas pressure is not
available from the pipeline, a nitrogen bottle with regulator
may be utilized to introduce the proper “False Signal” pressure.
Additionally, an SP series setpoint adjustment pump may be
used to provide a false signal pressure above the available
pipeline gas pressure.
Note: It is recommended that a calibrated pressure gauge be
used to ensure accuracy of the “False Signal” pressure.
9. Adjust the setpoint adjustment screw:
Turn the setpoint adjustment screw on top of the VRP-B-CH
unit until cylinder top and cylinder bottom pressure gauges
show equal pressure. Clockwise rotation decreases cylinder
bottom pressure. Turn setpoint adjustment only when
pressures are not equal.
Note: For pilots venting to atmosphere in control, continue,
otherwise, skip forward to the adjustment section for pilots
bleeding to a pressure system.
10. Final sensitivity drum adjustment
Turn the sensitivity adjustment to set the cylinder top and
cylinder bottom equal to power gas pressure. When equal,
the exhaust port should stop bleeding gas. If not, turn the
sensitivity adjustment drum to the left (increasing numbers)
until the exhaust port just stops bleeding.
11. To check the deadband, Turn the setpoint adjustment screw
clockwise until the cylinder bottom pressure just drops off.
Then turn the setpoint adjustment screw counterclockwise
until the cylinder top pressure just drops off. Keep track of the
total rotation of the screw. Now place the setpoint adjustment
screw in the middle of this rotation.
Turn the sensitivity adjustment drum to the right (decreasing
numbers) until the exhaust port just starts bleeding gas.
Check the total deadband again and repeat this process until
the deadband is eliminated and the following criteria is met:
With a 3/4 percent change in the sensing pressure (above
and below setpoint), the cylinder top and cylinder bottom
pressure should develop a pressure differential equivalent
to 20 percent of power gas.
Example:
Power gas = 100 psig
Orifice #3 top, #3 bottom
Setpoint = 400 psig
With a change of the sensing pressure to 403 psig, the cylinder
top pressure should drop at least 20 psig.
With a change of the sensing pressure to 397 psig, the cylinder
bottom pressure should drop at least 20 psig.
If the Pilot sensitivity is greater than this, bleed gas may further be
reduced by turning the sensitivity again to insure the pilot meets
the minimum criteria.
For VRP-B-CH pilots bleeding to a pressure system
10. Leave the pilot vent port attached to the system it normally
discharges to and insure this discharge line is open. The pilot
is properly adjusted when both gauges are equal at the pilots
desired setpoint, the cylinder pressure are set at 90 percent
of the power gas, and any movement to the adjustment drum
causes an immediate response from the pilot output gauges.
11. Verify “False Signal”:
Upon achieving setpoint, inspect the gauge which measures
the “False Signal.” If the “False Signal” has deviated, readjust
it to attain proper pressure. Remember that the “False Signal”
applied to the VRP-B-CH sensing port should be equivalent to
the desired pressure setpoint of the pilot. Upon readjustment
of the “False Signal” repeat steps 10 & 11 until setpoint
is achieved.
12. Remove “False Signal” pressure from sensing port of
VRP-B-CH.
13. Open valve on sensing line.
14. Open cylinder block valves:
Opening the cylinder block valves will reestablish
communication between the VRP-B-CH and the control
valve actuator and put the system back into service. Exercise
caution when putting the VRP-B-CH into service to prevent
unintended closure/opening of the valve.
Regulator is now ready for service.
The initial adjustments are utilized to set the VRP-B-CH at a point
approximating the desired setpoint. In order to achieve optimum
accuracy of setpoint and sensitivity, the fine tuning procedures
need to be completed.
Fine Tuning Procedures
To change the VRP-B-CH setpoint only:
In the case where the VRP-B-CH only requires a change in
setpoint only, the setpoint adjustment may be rotated to
achieve a new setpoint while the VRP-B-CH is in service.
No other adjustments need to be made. GE recommends
noting the setpoint change per revolution of the control spring
installed in the pilot. Setpoint change per revolution of the
control spring can be found in the table entitled VRP-B-CH
Pilot Selection Chart on page 6 of this manual.
To change the VRP-B-CH sensitivity:
In the event that the VRP-B-CH requires a change in to the
sensitivity adjustment, the setpoint adjustment will also require
adjustment. Any changes in the sensitivity adjustment affect
the setpoint adjustment. A decrease (higher numbers) in the
sensitivity of the pilot, will require the setpoint adjustment to be
decreased. An increase (lower numbers) in the sensitivity of the
pilot, will require the setpoint adjustment to be increased.
Once adjusted, the Becker VRP-B-CH pilot typically requires
very little or no readjustment.
Troubleshooting
Control problems generally fall into one of the following

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 8
© 2016 General Electric Company. All rights reserved.
three categories:
1. Regulator is too sensitive: Position of the regulator will
change frequently while control pressure is stable.
2. Regulator is not sensitive enough: Control pressure
fluctuates while position of the regulator does not change
(or changes very little).
3. Regulator is lagging behind changes in the control pressure:
The control pressure fluctuates while the regulator is
constantly changing its position.
Case # 1 Regulator is too sensitive:
Turn the sensitivity adjustment drum to the left (increasing
numbers on the scale) by small increments. Typically good
control is achieved within one or two divisions on the sensitivity
adjustment drum.
WARNING: Do not turn the sensitivity adjustment drum to the
left (Increasing numbers on the scale) more than one full turn
(11 numbers) from the initial adjustment position. While certain
VRP models will become insensitive on even minimal rotation,
turning more than one full turn will guarantee excessive
deadband on any VRP model.
Case # 2 Regulator is not sensitive enough:
The pilot should be able to meet the response criteria as described
in the adjustment section (20 percent change in output differential
with a 3/4 percent change in sensing pressure). If this adjustment
does not produce satisfactory results, most likely the control valve
torque has elevated. To further improve sensitivity, the control
valve must be lubricated. See the Becker ball valve regulator
maintenance manual for information on how to service the
Becker control valve.
Case # 3 Regulator is lagging behind changes in the
control pressure:
Increase both inlet orifice settings. This will cause the regulator
to move faster. Turn the sensitivity adjustment drum to the left
(Increasing numbers on the scale) in order to maintain the desired
cylinder top and cylinder bottom pressures. Finally, turn the set
point adjustment screw clockwise to increase the set point for the
original desired pressure. Changing the set point will not change
the sensitivity.
If the simultaneous increase of both adjustable orifices did not
produce the desired result (i.e. the regulator is still unstable) it
is necessary to set the adjustable orifices to open and close at
different rates. This can be achieved by doing the following:
1. Open both adjustable orifices to #6 and note the total swing
of the regulator. Leave the top adjustable orifice (controlling
the opening speed of the regulator) at #6, and reduce the
bottom adjustable orifice (controlling the closing speed of the
regulator) to #3. If the swing has stopped, or at least reduced,
the direction of speed adjustment is correct (the closing speed
should be smaller than the opening speed). In order to find
the optimum setting, try several combinations of adjustable
orifice settings.
2. If the swing of the regulator has increased, change the
direction of speed adjustment. Reduce the top adjustable
orifice (controlling opening speed of the regulator) to # 3,
and increase the bottom adjustable orifice to #6.
3. If stability of the unit cannot be achieved through different
adjustable orifice setting combinations, the gain of the
pilot is too high. Leave the adjustable orifices at the setting
combination which generates the smallest swing. Turn the
sensitivity adjustment drum to the left (decreasing numbers
on the scale) by small increments until the stability is achieved.
4. Finally, turn the setpoint adjustment screw clockwise to
increase the setpoint. Changing the setpoint will not change
the adjusted mode.
Inspection Procedure
As with all precision equipment, it is necessary to periodically
test the pilot to insure optimum performance. We recommend
the following procedure once a year:
1. Close the cylinder block valves in order to prevent the control
valve from moving.
2. Close valve on the sensing line.
3. Shut off supply pressure and bleed down at pilot. Note the
settings of the adjustable orifices before removing them from
the orifice assembly. Remove adjustable orifices and clean
then thoroughly. Reinstall using new O-rings, being sure to
install each orifice into the hole from which it was removed
(the orifice and block have matching numbers for this
purpose). Reset adjustable orifices to original settings.
4. Turn on supply pressure.
5. Check the integrity of the pilot balance valve seats by
changing the sensing pressure 3/4 percent above and below
the pilot setpoint. One cylinder pressure gauge should drop
to 20 percent less than power gas when the pressure is raised.
At setpoint the bleed gas should be minimal. If the exhaust
port does bleed gas, you should be able to stop the venting
by turning the adjustment drum a couple of numbers to the
left. If the venting gas will never shut off with both gauges
balanced and reading full power gas pressure, the balance
valve seats are worn. Failure to stop venting supply pressure
is a sign of a worn pilot seat. Shut off power gas supply, bleed
off all remaining pressure, and rebuild pilot according to
procedure in the Assembly section.
6. Reinstate power gas and soap test around all diaphragms,
vents and orifice assembly. Unless a leak is found, it is not
necessary to disassemble the pilot. If any leaks are found
around the diaphragms, all rubber goods must be replaced.
7. Apply a “False Signal” pressure to the sensing chamber.
Observe operation of the gauges. If any gauges are defective,
replace them.
8. Perform the internal friction test.
9. Readjust the VRP-B-CH pilot if necessary.

9 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
Internal Friction Test
Friction may occur if the diaphragms were not centered properly
during installation or dirt has accumulated inside the pilot. To
test for this friction:
1. Adjust the pilot using the initial adjustment procedure.
2. With both cylinder output gauges balanced, turn the adjusting
screw slightly clockwise to decrease cylinder bottom pressure.
Once the pressure reading on the gauge stops falling, turn the
screw back in the opposite (counterclockwise) direction. The
gauge arrow should immediately reverse.
3. Follow the reverse procedure on the cylinder top gauge.
4. If either of the gauge needles dip first before climbing, the
pilot has friction and must be taken apart, cleaned and
reassembled.
Annual Maintenance Checklist
Refer to Inspection Procedure on previous page.
1. ________ Clean and inspect adjustable orifice assemblies.
Refer to Number 3, Page 8
2. ________ Soap test all diaphragm mating surfaces and
adjustable orifice assembly to check for leaks. Refer
to Number 6, Page 8
4. ________ Replace rubber goods using the Becker VRP-B-CH
pilot seal kit if necessary. Refer to the Assembly
Procedures Page 16
5. ________ Confirm power gas supply pressure is correct. Refer
to original GE invoice paperwork for proper power
gas setting.
6. ________ Check sensitivity of VRP-B-CH pilot. Confirm proper
adjustment. Refer to Adjustment Procedure, Step 10,
Page 7
7. ________ Observe operation of gauges and replace if
defective.
8. ________ Perform internal friction test, Refer to previous
section.
9. ________ Inspect and verify proper operation of all VRP-B-CH
accessories. Refer to technical manual included with
each specific instrumentation accessory for further
instruction.
Note: It is not necessary to replace any rubber goods in GE’s
Becker instrumentation or instrumentation accessories on
a regular basis. However, common practice suggests that
replacement of rubber goods on a five-year cycle basis provides
adequate preventative maintenance.
Parts Ordering
The following is provided to allow the ordering of replacement
parts. Please specify the Becker instrument serial number
when ordering parts (this can be found on the Stainless Steel
tab attached to the pilot by the 7/16 hex head cap screws. If the
instrument was supplied as a complete valve regulator package,
the Stainless tag attached to the actuator piston can also provide
the serial number. See Drawing #30-0110.
Key Description Part No. Quantity
1(1) 1/2-20 Jam Nut 98-3056 2
2 Seat Cover 35-1519 1
3 Orifice Assembly 35-1015 1
4 1/4-20 x 2-1/2 HHCS 98-3180 4
5 Inside Piston 30-7004 1
6 -28 Jam Nut 98-3214 1
7 Adjusting Drum 35-1520 1
8 Lexan Cover 25-1034 1
9 Outside Piston 35-1506 1
10 10-32 x 3/8 FHMS 98-2684 2
11 3/16-1/2 Roll Pin 98-3089 4
12 O-Ring -012 95-2615 7
13 Gauge Manifold 35-1013 1
14 Valve Adjusting Screw 35-1517 1
15 Washer 25-1016 4
16 Pilot Base 30-7005 1
17 8-32 x 1/2 SHCS 98-2614 2
18 Pilot Post 35-1521 2
19 Spacer 35-1526 2
20 8-32 x 1” SHCS 98-3144 2
21(1) 1/4-20 x 3/4 HHCS S.S. 98-3137 6
22 Diaphragm w/ Convolute 25-1027 2
23 5-40 x 1/4 SHCS 98-2629 1
24 Double Pilot Body 35-1504 1
25 Seat Assembly 01-7082 2
26 Balance Valve Assembly 35-1510 2
27 O-Ring -010 95-2609 2
28(2) #10 Lockwasher 98-3178 2
29 Strainer for Balance Valve 35-1559 2
(1) Torqued to 140-160 in-lbs.
(2) Torqued to 95-100 in-lbs.
Seal Kits
A seal kit containing diaphragms, O-rings, seats, and balance valve
assemblies for the Becker VRP-B-CH pilot is available directly from
GE. Simply contact GE and refer to the following part number:
VRP-B-CH Pilot Model Repair Kit Part No.
VRP-B-175-CH 30-9102
VRP-B-600-CH 30-9104
VRP-B-1000/1500-CH 30-9105

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 10
© 2016 General Electric Company. All rights reserved.
Notes: 1) Item no. 1 Is torqued to 140-160 in-lb. 2) Items no. 21 and 28 are torqued to 95-100
in-lb.’
VRP-B-CH Pilot Blank Parts

11 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
VRP-B-CH Pilot Spring Chamber Parts
1
2
4
6
8
9
11
12
14
16
17
18
19
22
3
5
7
10
13
15
20
21
175/600-CH Spring Chamber
175/600-CH Spring Chamber Assembly
Anodized Aluminum(1) Part # 30-0012
Key Part
Number Description
130-7022 Adjusting Screw
298-2500 7/16 in. - 20 in. Jam Nut
330-7009 Seal Neck
498-3181 7/16 FT Washer (SS)
595-2672 O-Ring - 108
630-7017 7/16 Thread Seal
795-2670 O-Ring - 115
830-7008 Cartridge Cap for 175/600-CH
998-3137 1/4-20 in. x 3/4 in. HHCS (SS)
10(2) 98-3269 8-32 x 1/2 in. SHCS (Alloy) (FEP only)
11 95-2671 O-Ring - 141
12 30-7007 Standard Tube Cap
13 25-1306 Yellow Spring
14 30-7002 Spring Cartridge for 75/600-CH
15 25-1062 Thrust Bearing
16 30-7006 Standard Bearing Case
17 30-7001 Bearing Nut
18 98-3213 1/2 in. - 20 in. LH Jam Nut (316)
19 98-3227 0.250 in. x 0.500 in. Washer (Fiberglass)
20 98-3228 1/4-20 x 7/18 in. SCHS (SS) for 175-CH
21 30-7003 Inner Tube
22 98-3230 1/4-20 x 2 in. SCHS (SS) for 600-CH
(1) Stainless steel versions available
(2) Item #10 is 98-2614 (8-32 x 1/2 inch SS) for VRP models

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 12
© 2016 General Electric Company. All rights reserved.
Key Part Number Description
1 30-7022 Adjusting Screw
2 98-2500 7/16” - 20” Jam Nut
3 30-7009 Seal Neck
4 98-3181 7/16 FT Washer (SS)
5 95-2672 O-ring - 108
6 30-7017 7/16 Thread Seal
7 95-2670 O-rIng - 115
8 30-7008 Cartridge Cap for 1000/1500-CH
9 98-3137 1/4 - 20 x 3/4” HHCS (SS)
10(2) 98-3269 8-32 x 1/2” SHCS (Alloy) (FEP and 1500-CH
only)
11 95-2671 O-ring – 141
12 30-7007 Std. Tube Cap
13 30-7085 Tube Cap (SS) for 1500-CH
14 25-1306 Yellow Spring
15 25-1562 Grey Spring for 1500-CH (800-1300 psig)
16 25-8073 Violet Spring for 1500-CH (1000-1500
psig)
17 30-7023 Spring Cart. for 1000/1500-CH
18 30-7006 Standard Bearing Case
19 30-7027 Bearing Case for 1500-CH
20 30-7001 Bearing Nut
21 25-1062 Thrust Bearing
22 98-3227 .250” x .500” Washer (Fiberglass)
23 98-3213 1/2’20 LH Jam Nut (316)
24 98-3229 1/4 - 20 x 1-1/2” SCHS (SS)
25 30-7003 Inner Tube
26 98-3231 1/4-20 x 2” SCHS (SS)
(1) Stainless steel versions available
(2) Item #10 is 98-2614 (8-32 x ½” SS) for VRP models (except 1500-CH)
1000/1500-CH Spring Chamber Assembly
Anodized Aluminium(1) Part # 30-0013
17
18,19 20
21 22
23 24
25
26
14, 15,
16
1000/1500-CH Spring Chamber
VRP-B-CH Pilot Spring Chamber Parts

13 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
Key Part Number Description
1 30-7024 Cartridge Space
2 95-2656 O-rIng - 038
3 98-3056 1/2-20 Jam Nut (316)
4 30-7012 Diaphragm w/Hole
5 30-7015 Thread Extension
6 98-3153 1/4-20 x 1-1/2” HHCS
7 35-1549 Spacer
8 35-1548 Bottom Flange
9 30-7020 Washer
10 95-2615 O-ring - 012
11 98-3137 1/4-20 x 3/4” HHCS
12 30-7025 Piston
175-CH Sensing Assembly
Anodized Aluminum(1) Part #30-0021
Key Part Number Description
1 98-3056 1/23-20 Jam Nut (316)
2 25-1027 Diaphragm w/Conv.
3 25-1156 Bottom Spacer
4 95-2615 O-rIng - 012
5 25-1177 Bottom Piston
Key Part Number Description
1 30-7016 Adapter Block
2 95-2665 O-ring - 145
3 98-3056 1/2-20 Jam Nut (316)
4 30-7015 Thread Extension
5 30-7010 Small Piston
6 30-7014 Small Washer
7 30-7011 Conv. Diaphragm w/Hole
8 95-2615 O-ring - 012
9 30-7058 Top Spacer
(1) Stainless steel versions available
600-CH Sensing Assembly
Anodized Aluminum(1) Part #30-0020
1000/1500-CH Sensing Assembly
Anodized Aluminum(1) Part #30-0019
175-CH Sensing Chamber
Maximum allowable operating pressure (MAOP) = 225 psig
600-CH Sensing Chamber
Maximum allowable operating pressure (MAOP) = 600 psig
1000/1500-CH Sensing Chamber
Maximum allowable operating pressure (MAOP) = 1500 psig
VRP-B-CH Pilot Sensing Chambers Parts

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 14
© 2016 General Electric Company. All rights reserved.
Appendix
Flow Calculations
Critical Flow
Qc= 312.8 x P1x Cvx 1
G x (T + 460)
Variables:
Qc= critical flow across the inlet orifice in scfh
P1= supply pressure to the pilot in psig
Cv= 0.00447 x n1.656242
G = specific gravity of the gas
T = temperature of the gas in °F
Steady State Consumption for downstream bleed*
*(<10 scfh for bleed to atmosphere)
Qssc = steady state consumption
Qc1 = critical flow across the top orifice in scfh
Qc2 = critical flow across the bottom orifice in scfh
Cv= 0.00447 x n1.656242
n = number of the orifice setting on orifice block (1 through 6)
Qssc = Qc1 + Qc2
Supply Regulator Capacity
Qsrc = 2Qc
Variables:
Qsrc = supply regulator capacity
Cv= 0.0869 (calculated with n= 6)
Travel Time
Minimum travel time (the time the valve takes to move from one
extreme position to another) is achieved when the signal deviates
5% or operation. The monitor or standby regulator pilot travel time
is governed by the flow capability of the supply orifice. The control
valve pilot travel time is governed by the exhaust capacity of the
balanced valve. This is shown as t1below:
t1= 0.148 x G
T + 460
S x D2
Cv
x
a) Monitor/Standby pilot bleeding to atmosphere
or downstream:
Variables:
t = time in seconds
S = cylinder stroke in inches
D = cylinder diameter in inches
Cv= flow factor (for orifice or booster)
b) Working pilot time from 50 percent open to either extreme:
t = t1+ 0.0003906 x S x D2x P2
Gas Consumption Table(1)
Suppy Gas
pressure
(psig or psid)
Orifice number
2 3 4 5 6
100 29 56 90 130 176
150 41 80 130 187 253
200 54 105 169 244 330
250 66 129 210 301 407
Consumption (SCFH) for monitor and standby valve. For figure
while in control, divide by 2.
(1)ONLY APPLIES TO VRP-B-CH WHEN BLEEDING TO A PRESSURE
SYSTEM!

15 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
Accessories
The following Accessories are available to enhance the
operation or provide additional features to your VRP-B-CH
Series Double-Acting Pilot Control System. For additional
information regarding a specific VRP-B-CH accessory,
please contact GE.
SP Series Set Point Change
Pump:
Provides a simple and accurate
method of applying false signal
pressure during initial adjustment of
the VRP pilot. The pump can provide
a false signal pressure of 20%-50%
in excess of working pipeline
pressure which eliminates the need
for nitrogen bottles or electronic
calibration devices.
Remote Set Point Module:
Provides remote adjustment of VRP-
B-CH Pilot set point via an electrical
signal. Standard input signals are 24
VDC pulse and 120 VAC pulse. A 4-20
mA input signal motor is optional.
All motors provide 4-20 mA setpoint
feedback.
AB Series Atmospheric
Bleed Control:
Maintains minimum pressure
differential across the cylinder.
AB Control is required to provide
the necessary output to operate
the control valve under all design
conditions.
Note: See Page 6 for adjustment
information.
NBV Series No Bleed Valve:
Achieves non-bleeding conditions
at both full open and full closed
positions without any adjustment.
Selection based upon power
gas pressure and discharge gas
pressure.
DPS-2 Series Sensor Adjustments
1. Turn the adjusting screw of the DPS-2 sensor clockwise until it
extends about 1-3/4” from the top of the spring cartridge.
2. Adjust the VRP-B-CH according to the pilot adjustment
procedures.
For a normally open regulator (Monitor):
3. Bleed off the sensing pressure.
4. Wait until the pressure reading on the cylinder bottom gauge
is zero.
For normally closed (standby) regulator:
3. Increase the sensing pressure 5 percent above setpoint.
4. Wait until the pressure reading on the cylinder top gauge is
equal to zero.
5. Turn the adjusting screw of the DPS-2 sensor counterclockwise
until the exhaust port of the VRP-B-CH stops bleeding gas.
Then turn the adjusting screw an additional half turn in the
same direction.
6. The pressure sensor is now set for the existing supply
pressure. If the supply pressure to the VRP-B-CH is changed,
the sensor must be reset.
DPS Series Non-Bleed
Sensor:
achieves non-bleeding conditions
in either full open or full closed
positions. Selection based upon
power gas pressure and discharge
gas pressure.
Note: See Page 6 for initial pilot
adjustment information.

Becker VRP-B-CH Series Valve Regulator Pilot Instruction Manual | 16
© 2016 General Electric Company. All rights reserved.
Assembly Procedures
Note: During assembly, moisten O-rings, threads, thrust bearings,
and the spring seat recess with a light-weight silicone grease.
Take special care to avoid applying grease to diaphragm sealing
surfaces, as this may compromise diaphragm sealing.
1. Using a 7/16-in deep well socket, insert the bottom seat
(rubber facing upward) (E) into the pilot body block (F).
1a. Install strainer for balance valves (D1) in the outside of the
spacer (D) and insert assembly on top of the bottom seat
(E).
1b. Insert the balanced valve assembly (C) with the stem
facing downward.
1c. Insert the second balanced valve assembly (C) with the
stem facing upward.
1d. Insert the second strainer (D1) and the spacer (D)
assembly.
1e. Insert the top seat (rubber facing downward) (E).
1f. Secure the seat assembly to the pilot body block (F) with
the two washers (C1), seat cover (B), and two Phillips head
machine screws (A).
G
H
I
Flush with
recess
A
C
C1
D1
D
D1
E
B
E
C
D
Note: Disregard this line in the pilot body
block (F) in all drawings.
F
Note: Install the washers (C1) to compensate for tolerance
variations.
2. Slide two -010 O-rings (G) onto valve adjusting screw (H) and
into the grooves at the top of the screw.
2a. Turn valve adjusting screw (H) into the outside piston (I) until
the screw head is flush with the piston recess.

17 | GE Oil & Gas
© 2016 General Electric Company. All rights reserved.
Orifice Block Assembly
1. Place O-ring -011 (N1) in the adjusting orifice (K1). Place the
assembly in the orifice manifold (K) as shown.
2. Place O-ring -011 (N1) in the nuts (M1) and secure the adjusting
orifice (K1) with nuts (M1) in the orifice manifold (K) as shown
3. Seat the four -012 O-rings (L) into the inlet and exhaust port
recesses on the pilot body block (F). (Note the orientation of the
body in relation to the orifice block).
3a. Attach the orifice block (K) to the pilot body block (F) with
two 1/4– 20 x 2-1/2-in stainless steel HHCS (J) by lining it
up with roll pins (M) in pilot body block (F).
J K
F
L
N
M
K
N1
M1
K1