Becker VRP-SB-CH User manual

Section Page
Introduction 2
Description 2
Scope of Manual 2
Advantages of –CH design 2
Applications 3
Technical Assistance 3
Technical Information 4
Specifications 4
Materials of Construction 4
Model Number Explanation 4
Control Spring Ranges 5
Principals of Operation 6
Adjustment Procedure 7
Initial Pilot Adjustment 7
Fine Tuning 11
Troubleshooting 12
Inspection Procedures 15
Maintenance Checklist 16
Instruction Manual
for
the VRP-SB-CH
Valve Regulator
Pilot
Table of Contents
Section Page
Parts Ordering 17
Seal Kits 17
VRP-SB-CH Blank 18
VRP-SB-CH Caps 19
VRP-SB-CH Sensing Carts. 20
Appendix
Calculations 21
Steady State Consumption 21
Supply Regulator Capacity 21
Orifice Cv table 22
Accessories: 22
SP Series Setpoint Pump 22
Remote Setpoint Module 22
AB Series Atmospheric
Bleed Control 22
Set Point Indicator 22
Volume booster 23
Assembly Procedures 24
VRP-SB-CH February 2000

VRP-SB-CH Pilot
Introduction
Introduction
The Becker VRP-SB-CH series Single Acting
Pilots represents a breakthrough in valve con-
trol 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. Furthermore, the VRP-SB-CH
series 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 hy-
drocarbons and diminishing natural resources.
Description
The Becker Model VRP-SB-CH Single-Acting
Pilot provides pressure control when utilized
with a single-acting piston actuated control
valve. The VRP-SB-CH measures downstream
sensing pressure and positions the single-
acting actuator to maintain the desired down-
stream pressure. The VRP-SB-CH Pilot may
be utilized for pressure control applications
with set points ranging from 1 psig to 1300
psig. The SB–CH design pilot represents
Becker’s commitment to continuous develop-
ment of new products and updating of existing
products to maximize their performance while
retaining simple operation and minimum main-
tenance.
Scope of Manual
This manual provides information on the instal-
lation, operation, adjustment, and maintenance
of the VRP-SB-CH single-acting pilot.
VRP-SB-CH 2February 2000
For information concerning actuators, valves,
and accessories, refer to the instruction manu-
als 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 con-
cerning these instructions, contact your Becker
sales representative, sales office, or manufac-
turer before proceeding.
Advantages of the Combination
Chamber VRP-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.
•Dead band drum turns easier
3. The Need for a flat diaphragm for some
pilot models is eliminated meaning…
•Five pilot model numbers instead of 11
•Less trouble-shooting during assembly
4. Larger measured variable chamber volume
dampens control pressure signal, helping
to compensate for vibration induced by
poor location of sensing tap in area of
flow pulsation and turbulence
5. Sensing gauge is brought up to eye level.
6. Control springs can be replaced without
disturbing any diaphragms.
7. Springs are guided by the outside resulting
in less likelihood of friction from poorly
aligned spring.
8. The accuracy of pilots is guaranteed to be
±3/4 %.

Applications
•Pressure Control
•Back Pressure Control
Technical Assistance
Should you have any questions, contact your
local Becker Precision sales representative or
Becker Precision technical assistance at:
Becker Precision Equipment, Inc.
Attn: Technical Assistance
950 Pratt Boulevard
Elk Grove Village, IL 60007 USA
Toll Free: [phone]
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Website: www.bpe950.com
Guidelines for Usage
Bleed to Pressure System: The VRP-SB-CH
Pilot is typically utilized for applications with a
discharge pressures of 250 psig or less in or-
der to ensure adequate speed of operation.
Bleed to pressure system eliminates atmos-
pheric emissions by keeping discharge gas in
the piping system.
CVE Globe Pattern Control Valves: The Model
VRP-SB-CH is the only single-acting pilot com-
patible with the Model CVE Globe Pattern
Valve.
Compatible Actuators:
•Becker LPSR Actuators (Linear Piston Spring
Return)
•Becker LD Actuators (Spring and Diaphragm)
•Other manufacturer’s Single-acting piston ac-
tuators*
*consult Becker for additional information
Retrofit Compatibility:
Optimum performance is achieved by pairing
the VRP-SB-CH with genuine Becker control
valve actuators. Should you already have ex-
isting control valve actuator(s) in service, the
addition of a Model VRP-SB-CH can improve
performance and minimize atmospheric bleed
emissions.
Some Compatible Actuators:
•Bettis T-Series Piston Actuators
•Fisher Type 1051/1052 Diaphragm Rotary Ac-
tuators
•Fisher Type 657/667 Spring & Diaphragm
VRP-SB-CH Pilot
Applications
Materials of Construction
Table 1. Materials of Construction
External Parts: anodized AL 2024
316 SS available
(for marine environments)
Internal Parts: 316 Stainless Steel and 2024 Anodized Alumi-
num
Springs plated steel
Diaphragms: Buna-N with Nylon Reinforcement
Seats and O-
Rings: Buna-N
Tubing & Tubing
Fittings: 316 Stainless Steel
Gauges: 2½ inch dial liquid filled brass connection w/
stainless steel case*
(standard issue with units of psig-
dual units of psig/kPa available)
VRP-SB-CH 3February 2000

Model Number Explanation
•The VRP-SB-CH pilot is available in four
different models to cover sensing pres-
sures from 1 psig to 1300 psig.
•The number expressed in the VRP model
designation is the maximum sensing pres-
sure (for example, a VRP –600-SB-CH has
a maximum sensing pressure of 600 psig).
VRP-SB-CH Pilot
Specifications
Technical Specifications
VRP-175-SB-CH
Reverse acting VRP-600-SB-CH Reverse acting VRP-1000-SB-CH Reverse acting VRP-1300-SB-CH Reverse acting
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 identifies the pilot revision series.
Table 2. Technical Specifications
Steady State Gas Consumption Zero
Supply Gas dry, filtered (100 micron) gas
Maximum flow capacity 2400 scfh (40 scfm) (Cv=1.5)
Maximum Supply Pressure 400 psig (2860 kPa)
Maximum Supply-Discharge
Differential 150 psig (1136 kPa)
Minimum Supply-Discharge
Differential 100 psig (791 kPa) (Ball Valves)
20 psig (239 kPa) (Globe Valves)
Operative Ambient
Temperature Range: -20°F to 160°F (-68°C to 256°C)
Approximate Weight:
12 pounds (5.4 kg)
Minimum Deadband 0.2% instrument signal
Control Accuracy ±0.75% of setpoint
Maximum Sensing Pressure 1300 psig
Setpoint Range 1 psig –1300 psig
10 kPa –8966 kPa
Housing meets NEMA 3 Classification
Installation Orientation vertical position recommended
Custom bracket supplied with Becker
Actuators
2” pipe mount provided for retrofit to
other manufacturer's actuators
VRP-SB-CH 4February 2000

VRP-SB-CH Pilot
Spring Ranges
Remote Setpoint Change Options
•The SM-1100 series motors accept a 24 VDC or 120 VAC input. The SM-1000 series motors accept a
4-20 MA signal and require a separate 12 VDC, 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.
Table 3. Selection Chart for VRP-SB-CH pilots
Selection Chart for VRP-SB-CH pilots
VRP-CH
Model Number Control Range
(psig/kPa) Spring Color Part
Number Setpoint change
per revolution of
setpoint screw
(psig/kPa)
Repair Kit
Part Num-
ber
Setpoint Range
Discreet remote
control (SM-
1100)
Setpoint Range
Analog
(4-20MA) re-
motel (SM-
VRP-SB-175-CH 1 –10 psig
6.9 –69 kPa Gold 25-8236 0.57 psig 3.9 kPa 30-9002 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 30-9002 11 psig 75.8 kPa 23 psig 159 kPa
15 –50 psig
103 –345 kPa Burgundy 25-8239 3.0 psig 21 kPa 30-9002 16.5 psig 114 kPa 35 psig 241 kPa
20 –85 psig
138 –596 kPa Pink 25-8240 6.4 psig 44 kPa 30-9002 35.2 psig 243 kPa 65 psig 448 kPa
50 –175 psig
345 –1207 kPa Yellow 25-1306 23 psig 157 kPa 30-9002 125 psig 862 kPa 125 psig 862 kPa
VRP-SB-600-CH 25 –140 psig
172 –965 kPa Beige 25-8238 7.4 psig 51 kPa 30-9004 41 psig 283 kPa 115 psig 793 kPa
50 –175 psig
345 –1207 kPa Burgundy 25-8239 11.3 psig 78 kPa 30-9004 62 psig 427 kPA 125 psig 862 kPa
135 –300 psig
931 –2069 kPa Pink 25-8240 24 psig 164 kPa 30-9004 132 psig 910 kPA 165 psig 1138 kPa
275 –600 psig
1896 –4137
kPa
Yellow 25-1306 85 psig
586 kPa 30-9004 425 psig 2930 kPa 425 psig 2930 kPa
VRP-SB-1000-CH
550 –1000
psig
3792 –6895
Yellow 25-1306 143 psig
990 kPa 30-9005 700 psig 4826 kPA 700 psig 4826 kPa
VRP-SB-1300-CH
800 –1300
psig
5516 –8964
Gray 25-1562 227 psig
1565 kPa 30-9005 900 psig 6205 kPa 900 psig 6205 kPa
VRP-SB-CH 5February 2000

Principles of Operation
The VRP-SB-CH pilot and single-acting cylinder actuator can be used in conjunction with varying valve types
to provide a complete package for stable and accurate pressure control over a wide range of applications.
The energy for control valve operation comes from pressure differential between the pilot supply and dis-
charge pressures. The regulated power gas channels through two adjustable orifices which supply gas to the
actuator and exhaust gas from the actuator.
When the measured variable is at setpoint both balance valves are closed and output pressure is in equilib-
rium with the actuator spring. The control valve remains stationary and there is no "bleed gas". As the meas-
ured variable rises above setpoint, the supply balance valve will open while the exhaust balance valve stays
closed. Output pressure will increase, and the control valve will close and lessen the flow. The measured
variable returns to setpoint and the supply balance valve will close. The output pressure will have a new
higher value and be in equilibrium with the new position of the actuator spring. If the measured variable falls
below setpoint, the exhaust balance valve will open while the supply balance valve stays closed. The output
pressure will reduce, and the control valve will open and flow will increase which will return the measured
variable to the setpoint. If one of the balance valves remains open, the output pressure will continuously
change (either increase or decrease, depending upon which valve is open) until the control valve moves to
the exact setpoint. Then the balance valves will close, and the control valves remains stationary.
Exhaust
VRP-SB-CH Pilot
“How-It-Works”
VRP-SB-CH 6February 2000

VRP-SB-CH Pilot
Adjustment Procedure
False Signal
Supply Valve False Signal
Bleed Valve
This feature represents the auto-reset or integral characteristic of the pilot.. The balance valves can be ad-
justed with slight dead-band to minimize constant correction fo the control valve position. This will reduce
the total gas consumption of the pilot, but will introduce a small error in the setpoint. The speed control
valve allows for proper adjustment of the VRP-SB-CH over widely varying operating parameters. There is
no principal difference between spring to close and spring to open systems. VRP-SB-CH reverse action is
achieved by tubing supply to P1, output to P2, and exhaust to P4.
VRP-SB-CH adjustment
Initial adjustment procedures must be followed after original installation, when changing operating condi-
tions, or after disassembly.
To change the setpoint or the response of the regulator, skip to the procedure for Fine Tuning Adjustment.
Adjustment Procedures
Initial Adjustment
Step 1: Adjust supply regulator to designated pressure (Supply and exhaust orifices or metering valves
should be wide open).
Step 2: Close valve on measured variable line. Then adjust measured variable pressure to desired value
using false signal valves.
Step 3: Close output block valve.
VRP-SB-CH 7February 2000

VRP-SB-CH Pilot
Adjustment Procedure
DIRECT ACTING PILOT
(spring to open valve) REVERSE ACTING PILOT (spring to close valve)
P3
Output
gauge
Exhaust
metering
valve
Supply
metering
valve
Supply
gauge P3
P2
P1
P4
Output
gauge
Supply
gauge
Supply
orifice
Exhaust
orifice
P3
P2
P1
P4
Supply
gauge
Exhaust
metering
valve
Output
gauge
Vent
port
Supply
metering
valve
P3
P2
P1
P4
VRP-SB-CH 8February 2000
Supply
gauge
Supply
orifice
Vent
port
Output
gauge
Exhaust
orifice P2
P4
P1

VRP-SB-CH Pilot
Adjustment Procedure
ADJUSTING DRUM
Step 4: Turn the adjusting screw counterclockwise until the control springs is fully unloaded. You
will feel the screw becoming much easier to turn.
Step 5: Turn sensitivity drum to the right as far as it will turn. (In direction of increasing numbers)
Then turn the drum one (1) complete rotation to the left (use the numbers as a guide)
ADJUSTING SCREW
To turn
Adjusting screw
To turn
Adjusting
Drum
VRP-SB-CH 9February 2000

For A Direct Acting Pilot
(supply gas to P3)
Step 6a: Turn the adjusting screw clockwise until the output gauge just drops off.
Step 6b: Go to step 7.
For A Reverse Acting Pilot
(Supply gas to P1)
Step 6a: Turn the adjusting screw clockwise until the output gauge just rises.
Step 6b: Go to step 7.
For Direct and Reverse Acting Pilot
Step 7: If the pilot vents gas, turn the adjusting drum to the left until the pilot stops venting gas. If
pilot does not vent gas, turn the adjusting drum to the right until the pilot starts venting gas, then
back off slightly to the left to stop the gas from venting.
Step 8: Adjust pilot at the set point by turning the adjusting screw.
NOTE: The pilot is at set point when the output pressure is stationary and not at the maximum or
minimum value.
Step 9: If pilot vents gas turn the drum more to the left until it stops venting and than go back to
step 8.
Step 10: When pilot is at set point and there is no vent gas, check if dead band is too large.
Change the measure variable pressure above and below the set point about 3/4% of its value. The
output pressure must reach its extreme values in about 5-10 seconds.
Step 11: Open the block valve and measure variable line. Put pilot in control.
VRP-SB-CH 10 February 2000
VRP-SB-CH Pilot
Adjustment Procedure

VRP-SB-CH Pilot
Adjustment Procedure
A. Dead Band
VRP-SB-CH Pilot should be adjusted at
the minimum dead band without steady
state bleed gas. In control, the dead
band can be widened to minimize bleed
gas further. The control accuracy will be
reduced.
NOTE: Steady state can be judged only
when the control valve is stationary.
B. Speed of Response or Stability Ad-
justment
1. VRP-SB-CH with Globe style con-
trol valve (spring & diaphragm Ac-
tuator).
1.1. Standard Configurations:
a. Power Gas
35 psig for 6-30 psig spring
20 psig for 3-15 psig spring
150 psig –maximum supply to VRP-SB-
CH
b. Supply & exhaust orifices:
Control valve “M”-medium, monitor valve
“L” Large. If at the time or ordering appli-
cation is not known, “M” orifices are pro-
vided.
c. Installation
1. VRP-SB-CH should be installed as
close as possible to the control valve.
2. For actuators size 70 and larger use
½” tubing between diaphragm motor
and output of VRP-SB-CH.
3. Orifices are adjusted at the maximum
value #6. If stability cannot be
achieved supply and exhaust orifices
should be set at different values
Fine Tuning Procedures
FLOW
FLOW
Supply
VRP-SB-CH 11 February 2000
Reverse acting
VRP-SB-CH
Spring
to
close
Direct acting Spring
to
open
Supply

VRP-SB-CH Pilot
Troubleshooting
1.2. Stability Adjustment for Small Downstream System
The VRP-SB may be used with a dampening tank. Supply and exhaust orifices “M”, tank orifice
“standard” (Not marked)
This configuration is used for control valves installed for a short downstream system (For power
plants use VRP-SB-PID Controller).
a. Start up the system with supply and exhaust orifices at the maximum value #6. The tank orifice
should be at #1.
b. If the control valve is unstable slowly increase the tank orifice until stability is achieved.
c. If the control valve continues to cycle the supply and exhaust orifices should be set at different
values.
Note: Supply or exhaust orifices should not be set less than #2 opening. If desired control is
achieved with an orifice less than #2 opening the orifice barrel should be replaced with a smaller
one.
d. If desired control cannot be achieved, VRP-SB-PID controller should be used.
Direct acting shown
(Spring to open)
FLOW
VRP-SB-CH 12 February 2000

VRP-SB-CH Pilot
Inspection Procedure
2. Spring and Piston Actuator
(Single acting ball valve regulator BVR)
2.1. Standard configurations
a. Typical power gas
-100-150 psig (Discharge to atmosphere)
-up to 400 psig (Discharge to a pressure system)
-100 psig min. differential pressure required
between power gas and discharge gas.
b. Speed of response adjustment
¼ n.p.t. metering valves are used for supply and
exhaust.
c. Installation
VRP-SB-CH is typically mounted on the
BVR.
When the VRP-SB-CH is installed away
from the BVR, ½” tubing is recommended.
2.2. Stability Adjustment
(For short systems use VRP-SB-PID-150)
Refer to section 1.2 (p11). The same
steps should be taken as outlined in the
stability adjustment for a VRP-SB-CH with
spring diaphragm actuator.
FLOW FLOW
Direct acting
VRP-SB-CH
(spring to close)
Reverse acting
VRP-SB-CH
(spring to open)
VRP-SB-CH 13 February 2000

To actuators
Tank
Variable
Orifice
Tank
Variable
Orifice
Open on
increasing
Positioner
Close on
increasing
Positioner
DIRECT ACTING PILOTREVERSE ACTING PILOT
3. VRP-SB-CH Pilot with Pneumatic positioner. Large Downstream systems only (for short
systems use VRP-SB-PID)
a. Power Gas
35 psig for 6-30 psi output
20 psig for 3-15 psi output
b. Supply, exhaust and tank orifices
All orifices are “standard” (not marked).
c. Installation
1. Use 3/8” tubing minimum between the VRP-SB-CH and positioner.
2. VRP-SB-CH can be mounted directly on the control valve due to vibration resistance.
3. Refer to table 4 for proper orifice settings
VRP-SB-CH 14 February 2000
VRP-SB-CH Pilot
Adjustment Procedure

3.1 Stability Adjustment
a. Set supply and exhaust orifices according to Table 4:
Table 4. Orifice Settings for VRP-SB-CH installed away from control valve
b. Start up the system with all orifices set at #3.
c. Control valve is in a slow cycle (1-3 minutes). Observe the regulator response. Adjust the tank
orifice to smaller settings until full stability is achieved.
d. If required opening of the tank orifice is approaching #1, increase the supply and exhaust orifices
by a ½ number and then readjust the tank orifice.
e. If the control valve is in a fast cycle (5-30 sec.) slow down the response by increasing the orifice
in the tank orifice.
NOTE: Smaller # on the tank orifice represents faster response of the VRP-SB-CH Pilot
f. If stability cannot be achieved, the supply and exhaust orifices must be adjusted to different set-
tings.
C. Set Point
The setpoint may need adjustment when the regulator is placed in service after the initial adjust-
ments. If so, refer to Table 3 to determine the change in setpoint pressure per turn of the adjusting
screw. When the adjusting screw is properly set, tighten the adjusting screw locknut.
Table 4. Orifice Settings for VRP-SB-CH (case 4)
Distance in ft.
between VRP-SB-CH
and positioner
Supply and Exhaust
orifice # Distance in ft. Between VRP-SB-
CH and positioner
Supply and Exhaust
orifice #
Up to 10 330 5
15 31/2 35 5 1/2
20 440 6
25 4 1/2
VRP-SB-CH 15 February 2000
VRP-SB-CH Pilot
Adjustment Procedure

VRP-SB-CH Series Single-Acting Pilot Annual Maintenance Checklist
As with all Becker precision equipment, it is necessary to periodically test the pilot to insure opti-
mum performance. We recommend the following procedure once a year.
1. Close the output block valve in order to prevent the control valve from moving. Close the valve
on the Measured Variable line.
2. If VRP-SB-CH is equipped with speed control valves skip this step and go to step 3. Shut off
supply pressure and bleed down at pilot. Note settings of the Adjustable Orifices before re-
moving them from the orifice assembly. Remove the Adjustable Orifices and clean them thor-
oughly. Reinstall using new O-rings, being sure to install each orifice in the same hole form
which it was removed. Reset the Adjustable Orifices to original settings, noted above. Turn on
supply pressure.
3. Balanced Valve and Seat Inspection.
Change the control pressure at least 5% above and below the set point using the “false signal”
valves found on the bottom of the pilot. In each case soap test the exhaust port:
For Direct-Acting VRP-SB-CH
Exhaust port is P2.
a. When the control pressure is above the setpoint, the supply balanced valve is open and the
exhaust balanced valve (bottom block) is closed. Gas exhausting from port P2 indicates wear
and contaminants in the exhaust balanced valve assembly (bottom block).
b. When the control pressure is below the setpoint, the supply balanced valve is closed and the
exhaust balanced valve (bottom block) is open. Gas exhausting from port P2 indicates wear or
contaminants in the supply balanced valve assembly (top block).
For Reverse-Acting VRP-SB-CH
Exhaust port is P4
a. The supply and exhaust balanced valves are opposite to direct acting case above
Note: if a leak is found through one balanced valve only, it is not necessary to take apart both top
and bottom blocks. Only the block with the damaged balanced valve assembly requires disas-
sembly.
4. Soap test around all diaphragms, vents, and orifice assembly. Unless a leak is found it is not
necessary to take the pilot apart. If any leak is found around the diaphragms, all rubber goods
must be replaced. Take the pilot apart, replace all rubber goods, and reassemble the pilot.
5. Apply a “false signal” pressure in the sensing chamber. Observe operation of the gauges. If
any gauges are defective replace them.
6. Perform internal friction test.
VRP-SB-CH Pilot
Maintenance Checklist
VRP-SB-CH 16 February 2000

7. Readjust the Becker VRP-SB-CH if necessary.
Internal Friction Test
Friction may occur due to any one, or a combination of the following reasons:
a. The diaphragms are not centered properly.
b. The control spring is not seated properly over the spring nut, or defective.
c. Dirt or Ice build up inside pilot.
Step 1: Adjust the pilot using INITIAL ADJUSTMENT procedure. Keep pilot at the setpoint and
close output block valve.
Step 2: Eliminate the dead-band by turning the drum to the right about one or two divisions (turn
in the direction of increasing numbers. The VRP-SB-CH must have slight continuous bleed gas.
Turn the adjusting screw back and forth. Observe the output gauge response. If response of the
output gauge hesitates or the pressure moves in the opposite direction of the adjusting screw ro-
tation, the VRP-SB-CH has internal friction. For example if the VRP-SB-CH is direct acting, as the
adjusting screw is rotated clockwise the output gauge should go down without hesitation. If the
gauge goes up or hesitates before going down, internal friction is present.
Step 3: If internal friction is found, take the VRP-SB-CH apart and reassemble it.
The above test procedure precisely indicates the mechanical and pneumatic condition of the
Becker VRP-SB-CH pilot. Should you require any additional information or assistance, please feel
free to telephone on our toll free number, 1-800-323-8844.
VRP-SB-CH 16 February 2000
VRP-SB-CH Pilot
Maintenance Checklist

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 at-
tached to the pilot by the 7/16 hex head cap screws. If the instrument was supplied as a com-
plete valve regulator package, the Stainless tag attached to the actuator piston can also provide
the serial number. See Drawing #30-0317
Key Description Part No.
1Top Inside Piston 35-1528
21/4-20 x 3/4 HHCS S.S. 98-3137
3Bottom Inside Piston 35-1529
4Outside Piston 35-1506
5HPP-SB Top Body S.S 35-1546
6Lexan Cover 25-1034
7Seat Cover 35-1519
810-32 x 3/8 FHSHMS S.S 98-2684
9Strainer for B.V 35-1559
10 Washer 25-1016
11 Sensitivity Spacer S.S 25-8156
12 O-Ring -010 95-2609
13 Balance Valve Assy 35-1510
14 HPP-SB Bottom Body S.S 35-1545
15 Seat Spacer 35-1526
16 1/2-20 Hex Jam Nut S.S 98-3056
17 Seat Assy 01-7082
18 1/2-20 Alum Nut 25-1065
19 Thrust Bearing 25-1062
20 Adjusting Drum 35-1534
21 O-Ring -012 95-2615
22 Pilot Post 35-1535
23 8-32 x 1/2 SHCS 98-2614
24 Diaphragm w/ convolute 25-1027
VRP-SB-CH Pilot
Parts Lists
Seal Kit
A seal kit containing diaphragms, o-rings, seats,
and balance valve assemblies for the VRP-CH
pilot is available directly from Becker. Simply
contact Becker Precision Equipment and refer
to the following part number:
VRP-SB-CH Pilot Model Repair Kit
Part No.
VRP-175-SB-CH 30-9302
VRP-600-SB-CH 30-9304
VRP-1000/1300-SB-CH 30-9305
VRP-SB-CH 17 February 2000

VRP-SB-CH Pilot
Parts Lists
VRP-SB-CH 18 February 2000

VRP-SB-CH Pilot
Parts Lists
Key Description Part No.
1Seal Neck 30-7009
2Tube Cap 30-7007
2a Tube Cap for 1300 CH 30-7026
3O-Ring –141 95-2671
4Adjusting Screw 30-7022
5Bearing Case 30-7006
5a Bearing Case for 1300 CH 30-7027
6Bearing Nut 30-7001
77/16 Flat Washer S.S. 98-3181
8O-Ring -108 95-2672
9O-Ring -115 95-2670
10 8-32 x 1/2 SHCS 98-2614
11 Thrust Bearing 25-1062
Key Description Part No.
12 LH 1/2-20 Jam Nut 98-3213
13 Inner Tube 30-7003
14 7/16-20 Jam Nut 98-2500
15 Cartridge Cap 30-7040
15a Cartridge Cap for 175/600 CH 30-7008
16 Spring Cartridge 30-7023
16a Spring Cartridge for 175/600 CH 30-7002
17 1/4-20 x 1-1/2” SHCS 98-3229
17a 1/4-20 x 2” SHCS for 175/600 CH 95-2609
18 1/4” Fiberglass Washer 98-3227
19 7/16 Thread Seal 30-7017
20 1/4-20 x 3/4” HHCS 98-3137
21 1/4-20 x 3” SHCS for 1000/1300 98-3231
VRP-SB-CH 19 February 2000