Conoflow HP300 Instructions for use

HP300-IOM Rev. 0 6/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
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INSTRUCTION AND MAINTENANCE MANUAL
HP300 HIGH PRESSURE REGULATOR
CAUTION: These instructions should be read and
understood prior to installation, use, or maintenance.
GENERAL PRODUCT OVERVIEW
The HP300 Regulator is a self-contained, spring loaded
pressure reducing regulator. This unit is a piston sensed, self-
relieving regulator which allows a pressure setting reduction in
a closed system by relieving downstream pressure through the
regulator.
A Vespel main valve seat is utilized for bubble tight shut off in
dead-ended applications. Control pressure ranges can be
changed without removing the regulator from the process line.
MATERIALS OF CONSTRUCTIONS
When a relieving style sensor is used, hazardous or corrosive
fluids should not be used. When the non-relieving sensor is
used the HP300 will operate with any fluid (liquid or gas) which
is compatible with the materials of construction. To identify the
materials of construction, refer to Control Engineering Data
contained on page 4.
Body Brass/303SS/N.A.C.E 316SS
Bonnet Brass/Plated Brass
Main Valve Seat Vespel (Kel-F Optional)
Relief Valve Seat Kel-F
Sensors and Trim 300 Stainless Steel
Seals Buna-N / Teflon (Viton Optional)
REGULATOR CLEANING
The HP300 Series High Pressure Regulator is cleaned to ITT
Conoflow Specification ES8A 01 294.
OXYGEN SERVICE
Specification of materials in regulators used for oxygen service
is the USER’S RESPONSIBILITY. Cleaning for oxygen service
(per ES8A 01 297) to 3500 PSIG (24.20 MPa) is supplied by
ITT Conoflow at no additional cost. For special cleaning
requirements, the customer must supply specifications for the
desired level of cleaning. Cost will be advised prior to
performing the cleaning operation.
CAUTION: Maximum Supply Pressure
Stainless Steel 10,000 PSIG (69 MPa)
Brass 6,000 PSIG (41.4 MPa)
Maximum supply pressure can be derated based on internal
material selections. See notes in CED code (page 4).
WARNING: The HP300 is a relieving regulator and should
not be used with hazardous gases.
A 20 micron filter is installed in the regulator to stop random
contamination resulting from installation. An auxiliary filter is
recommended for all but the cleanest fluid. Gaseous fluid must
be free of excessive moisture to prevent internal icing or
condensation during operation.
OUTLET PRESSURE RANGES
OPTION CODE RANGE
“F” 0–500 PSIG (3.45 MPa)
“G” 0–800 PSIG (5.52 MPa)
“H” 0-1500 PSIG (10.35 MPa)
“J” 0-2500 PSIG (17.25 MPa)
“K” 0-4000 PSIG (27.60 MPa)
“L” 0-6000 PSIG (41.40 MPa)
PORTING CONFIGURATIONS
There are four (4) 1/4” NPTF connection on the HP300. The
supply connection port in labeled “IN” and the supply gauge
port is labeled “HI”. The outlet port is labeled “OUT” and the
outlet gauge port is labeled “LOW”. Care should be exercised
when installing the high pressure line to assure it is connected
to the inlet (“IN”) port, otherwise the regulator will not function
properly. See figure 1 on page 5 for port identification drawing.
Teflon thread tape is the preferred thread sealant when the
regulator is installed.
WARNING
Conoflow’s products are designed and
manufactured using materials and workmanship
required to meet all applicable standards. The use
of these products should be confined to services
specified and/or recommended in the Conoflow
catalogs, instructions, or by Conoflow application
engineers.
To avoid personal injury or equipment damage
resulting from misuse or misapplication of a
product, it is necessary to select the proper
materials of construction and pressure-
temperature ratings which are consistent with
performance requirements.

Page 2 of 7 HP300-IOM Rev. 0 6/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
INSTALLATION
The HP300 can be line or panel bracket mounted. For line
mounted applications, refer to porting configurations for proper
orientation of ports.
Panel bracket mounting can be achieved using the two 1/4-20
threaded mounting holes in the bracket. These threaded
mounting holes are spaced 2.80” (71.1 mm) apart.
PRINCIPLE OF OPERATION
Turning the control knob clockwise will increase the force
on the range spring and in turn the outlet set pressure.
Conversely, turning the control knob counterclockwise will
decrease the force on the range spring and decrease the outlet
set pressure. In equilibrium, the force exerted by the range
spring is balanced by the outlet pressure.
An unbalance between the outlet pressure and the set
pressure causes a corresponding reaction on the sensor and
valve. If the outlet pressure rises above the set pressure, the
piston sensor will lift allowing the main valve to seat. This
action causes the relief valve to open relieving the excess
pressure to atmosphere until equilibrium is reached.
If the outlet pressure falls below the set pressure, the range
spring will push the sensor down and unseat the main valve.
This allows supply pressure to flow through the main valve to
the downstream port increasing output pressure. At
equilibrium, the valve plug assumes a position which supplies
the required flow while maintaining the outlet pressure at the
set pressure. See figure 2 on page 5 for labeled assembly.
MAINTENANCE
All regulators require scheduled maintenance to remove
deposits left by the media and to replace parts worn or
damaged as a result of use. Annual maintenance is
recommended when the regulator is used under normal
conditions. More frequent maintenance may be required due to
the condition, cleanliness and/or corrosiveness of the media.
TOOLS REQUIRED
1/4”Open end wrench (“T” handle disassembly)
3/16” Wide, flat blade screwdriver (relief adjustment screw)
5/16” Wide, flat blade screwdriver (spring button screw)
1/2” Open end wrench (spring base on sensor assembly)
1/2” Wide, narrow blade screwdriver (sensor)
1/2” Socket (main valve gland)
3/4” Wide, narrow ground screwdriver (valve body)
1-3/4” Open end or crowfoot wrench (for the bonnet)
Pin Vise (remove sensor relief valve seat)
Pliers (to remove sensor assembly)
Retaining ring pliers (handknob retaining ring)
Tweezers (to remove connector pin from the main valve gland)
Other possible tools would be a vise, a clean lint-free cloth,
and a torque wrench.
CAUTION: MAINTENANCE
It is recommended that maintenance be performed by a person
experienced in the operation and repair of high pressure
regulators.
Maintenance of this unit is best performed by gripping a
protruding end of a pipe fitting installed into the regulator body.
WARNING: Bleed System Pressure Prior to Removing
Regulator for Servicing.
MAINTENANCE PROCEDURE
1. Adjust the handwheel to the full counterclockwise position.
Remove the hole plug and with retaining ring pliers remove the
retaining ring. Grip the handwheel firmly and pull upward until
free.
2. Unscrew the bonnet using 1-3/4” open end or crowfoot
wrench. This will come off as an assembly containing the
bonnet, thrust bearing assembly, spring button screw, spring
button, adjusting stem, stem rod, stem screw, and stem spring.
Note that the rod will drop free when the bonnet is unscrewed.
Lift off the range spring.
3. To service components in the bonnet assembly, remove
spring button screw. The adjusting stem, thrust bearing
assembly, and spring button will drop out. Unthread the stem
screw and remove the stem spring.
4. To remove the sensor assembly grip the spring base with
pliers and pull upward until assembly is free. Lift out the sensor
assembly backup ring and the sensor assembly O-ring.
5. Lift out the connector pin and then remove seat gland and
main valve seat using 1/2” socket.
6. Remove the main valve body as an assembly using 3/4”
screw driver.
7. With the main valve assembly removed from the body hold
firmly in hand and unthread the filter. The main valve plug and
main valve spring will drop out. Remove and inspect the valve
body backup ring and the valve body O-ring.
8. To disassemble the sensor assembly, grip the sensor and
unthread the spring base using a 1/2” open end wrench. When
the spring base is removed, the vent seat will be freed. With
your thumb, firmly push sensor until it is freed from the sensor
ring. Remove the O-ring and backup ring. The vent plug and
spring can be removed for inspection.
NOTE: See figure 3 on page 5 for exploded view.
THE REGULATOR IS RE-ASSEMBLED IN THE
REVERSE ORDER OF DISASSEMBLY, OBERSVING
THE FOLLOWING PRECAUTIONS:
1. Inspect all component parts and replace those worn or
damaged with ITT Conoflow replacement parts. Always
replace the valve seats if they have been removed.
2. All component parts should be cleaned to the cleanliness
level required for safe operation with the media used. All parts
in the flow stream must be free of particles which could prevent
proper seating of the main valve.

Page 3 of 7 HP300-IOM Rev. 0 6/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
BONNET ASSEMBLY
A. Lubricate the left hand threads of the adjusting stem with
Krytox grease. Thread the spring button onto the threads, large
end first. Place a well-greased thrust bearing assembly on the
adjusting stem with the shield away from the spring button.
B. Slide the adjusting stem, spring button, and thrust bearing
assembly into the bonnet until the end comes through the
center hole in the end of the bonnet. Rotate the adjusting stem
and spring button until the 1/4-20 threads in the spring button
are aligned with the slot in the side of the bonnet. Using a 5/16”
flat blade screwdriver, screw the spring button screw into the
spring button and tighten to 30 in. lbs.
C. Press the handwheel onto adjusting screw until the groove
is cleared. Install the wavy retaining ring onto the adjusting
stem in the groove provided. Set the bonnet assembly aside.
SENSOR ASSEMBLY
Sensor Assembly for 0-500/800/1500 PSIG Ranges (No
Backup Ring)
A. Lubricate the O-ring with Krytox. Also lubricate the groove in
the sensor ring. Place the O-ring in the groove in the sensor
ring. Secure the O-ring by installing the sensor. When installing
the sensor, insert the smaller diameter end of the sensor into
the sensor ring until it seats firmly.
Sensor Assembly for All Other Pressure Ranges
A. Lubricate the O-ring and backup ring with Krytox grease.
Install the backup ring in the sensor ring so the flat side is
against the shoulder. Place the O-ring in the sensor ring
against the backup ring. Secure the O-ring and backup ring by
installing the sensor. When installing the sensor, insert the
smaller diameter end of the sensor into the sensor ring until it
seats firmly.
ALL SENSOR ASSEMBLIES
A. – Relieve to Atmosphere models: Insert the spring in the
sensor. Place the relief plug on the spring so the shoulder is
against the spring. Place the relief seat on the relief plug with
the small countersunk side towards the relief plug. Snap the
relief seat into the counterbore of the sensor.
B. Screw the spring base on the threads of the sensor being
sure the relief seat correctly engages the counterbore in the
sensor. Torque the spring base to 75 in.lbs.
REGULATOR ASSEMBLY – MAIN VALVE
ASSEMBLY
1. Holding the main valve body, with the large groove neck
facing down, insert the main valve plug. Place the main valve
plug spring over the main valve plug and thread the filter until it
seats.
2. Install the main valve body backup ring and the main valve
body O-ring in the groove on the main valve body. Lubricate
both component parts and the groove with Krytox grease prior
to assembly.
3. Thread the main valve body assembly into the body hand
tight. With the 3/4” wide, narrow ground screwdriver, thread the
main valve body until it is flush with the flat surface on the
counterbore face of the body.
4. Snap the main valve seat into the seat gland. For Kel-F
seats, install the countersink away from the seat gland. Vespel
seats do not have this countersink. Lubricate the threads on
the seat gland with Krytox grease and thread into the main
valve body until flush. A 1/2” socket is needed to tighten the
main valve body. Tighten to 75 in. lbs.
5. Insert the connector pin in the seat gland with the square
end pointing up.
REGULATOR ASSEMBLY
1. Lubricate the sensor assembly backup ring and the sensor
assembly O-ring with Krytox grease. Install the O-ring in the
counterbore in the body and place the backup ring on top.
2. Place the sensor assembly, with the spring base facing up,
in the body until it engages the O-ring and backup ring.
3. Place the range spring on the spring base of the sensor
assembly. Install the bonnet assembly and torque to 50 ft. lbs.
4. Relieve to Atmosphere Models: Slip the stem rod into the
adjusting stem and let it drop-down to the vent seat Slide the
stem spring into the adjusting stem and thread the stem screw.
Do not tighten the stem screw, only start the threads.
5. Relieve to Atmosphere Models: Connect an air supply to the
inlet port of the regulator and slowly increase the outlet
pressure to 100 PSIG. SLOWLY tighten the stem screw until
the relief valve opens and flow is heard. Back out the stem
screw just past the point where the relief valve re-seals.
6. Install the handwheel’s hole plug.
Prior to installation, the regulator should be connected to a
pressure source with a media compatible with the use of the
regulator, and should be pressurized to check for internal and
external leakage and operating characteristics.
NOTE: See figure 2 on page 5 for assembled view.
.

Page 4 of 7 HP300-IOM Rev. 0 6/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
Regulator Model Breakdown (CED Code)
Control Engineering Data is intended to provide a single source from which one can determine, in detail, the full scope of the
product line. In addition to the materials of construction, diaphragm and elastomer selection, it also provides all necessary
data regarding adjustment option and range selections. Control Engineering Data also provides a means of communicating
by way of a code number which is fully descriptive in product selection. All catalog numbers received must contain fifteen
(15) characters.
1 through 5 HP300 Pressure reducing Regulator, Piston Type (High Outlet)
Body / Bonnet / Trim
6 B Brass / Brass / 300 Stainless Steel
S 303 Stainless Steel / Nickel Plated Brass / 300 Stainless
R N.A.C.E 316SS / Nickel Plated Brass / 316 Stainless Steel (See Notes 1 & 2)
Main Valve Seat / Vent Valve Seat / Backup Ring / O-Ring / Notes
7 through 8 11 Vespel / Kel-F / Buna-N or Teflon / Buna-N / -
12 Kel-F / Kel-F / Buna-N or Teflon / Buna-N / 4
13 Vespel / Kel-F / Teflon / Viton / -
14 Kel-F / Kel-F / Teflon / Viton / 4
15 Vespel / None / Buna-N or Teflon / Buna-N / 3
16 Kel-F / None / Buna-N or Teflon / Buna-N / 3 & 4
17 Vespel / None / Teflon / Viton / 3
18 Kel-F / None / Teflon / Viton / 3 & 4
9 N Non-relieving (Optional)
V Relieve to atmosphere
W Non-relieving (No Filter) (Optional) (See Note 5)
10 through 11 61 1/4” NPT Connections (See Note 6)
12 P Panel Mounting Bracket (Optional)
S Plain bonnet (No threads) (Standard)
13 A Regulator is cleaned to ITT Conoflow Specification ES8A 01 294
B Oxygen Cleaning: Specification of materials in regulators used for oxygen service
is the user’s responsibility. Cleaning for oxygen service to 3500 PSIG
(24.20 MPa) is supplied by ITT Conoflow at no additional cost.
C Customer Specified Cleaning: Customer to specify the desired level of
cleanliness. ITT Conoflow will advise cost prior to performing cleaning operation.
Specification of materials is the USER’S RESPONSIBILITY.
14 B Handwheel
T “T” bar handle (Optional)
15F 0-500 PSI (0-3.45 MPa)
G 0-800 PSI (0-5.52 MPa)
H 0-1500 PSI (0-10.35 MPa)
J 0-2500 PSI (0-17.25 MPa)
K 0-4000 PSI (0-27.60 MPa)
L 0-6000 PSI (0-41.40 MPa)
NOTES:
1. National Association of Corrosion Engineers.
2. Maximum supply pressure must not exceed the maximum pressure rating of the supply connection and supply gauge connection.
3. These options are offered for non-relieving units.
4. The options cannot be used for 10,000 PSIG (69.00 MPa) applications. Use Vespel main valve seats for applications above
6000 PSIG (41.10 MPa).
5. Option W is 120 mesh screen.
6. All gauge port connections are 1/4” NPT.

Page 5 of 7 HP300-IOM Rev. 0 6/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
CONNECTION IDENTIFICATION AND TYPICAL GEOMETRY
HP300B11V61SABF CONFIGURATION SHOWN
FIGURE 1: HP300 Regulator Port Locations FIGURE 2: Labeled Section View of HP300 Regulator
FIGURE 3: Exploded View of HP300 Regulator

Page 6 of 7 HP300-IOM Rev. 0 6/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
FIGURE 4: HP300 Regulator Shown with Optional Panel Mounting Bracket
(HP300B11V61PABJ configuration shown)
FIGURE 5: Sensor Assembly without Relief Valve FIGURE 6: Sensor Assembly with Relief Valve

Page 7 of 7 HP300-IOM Rev. 0 6/20
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
TROUBLESHOOTING
When performing necessary corrective action in the following operations, refer to the MAINTENANCE section for the necessary
procedure.
PROBLEM:
The regulated pressure continues to increase after lock-up and without change in the control mechanism position.
POSSIBLE CAUSE:
The main valve seat needs replacement; follow maintenance procedure and regulator assembly.
The sensor assembly needs cleaning and the seals need to be replaced; follow maintenance procedure and sensor disassembly and
reassembly.
PROBLEM:
Continuous leakage through the bonnet, with the outlet pressure on the regulator.
POSSIBLE CAUSE:
Vent valve needs adjustment.
Vent valve seat needs replacement.
Sensor O-ring is worn, leaking, and needs to be replaced.
PROBLEM:
Regulated pressure drops off sharply when the flow is within the regulator’s capabilities.
POSSIBLE CAUSE:
Check the inlet filter and clean if necessary.
Main valve seat needs replacement; follow maintenance procedure and regulator assembly.
An ITT Company