Page 1
I & M JRPH Series
3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
lowfl[email protected] • www.lowflowvalve.com
Warning: Low Flow Regulators must only be used, installed and repaired in accordance with these Installation &
Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event of leakage or other malfunction, call a qualified service person; continued operation may cause system failure or a general
hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassembling a valve,
be sure to release all spring tension.
Please read these instructions carefully!
Your LowFlow/Jordan product will provide you with long,
trouble-free service if it is correctly installed and maintained. Spending a few minutes now reading these instructions can save hours of trouble and downtime later.
When making repairs, use only genuine LowFlow Valve
parts, available for immediate shipment from the factory.
Ideal Installation
Note: Do not use the regulator as a shut off device!
Outlet
Supply
P1
JRPH
P2
Bypass
Installation Instructions for JRPH Low Range
Series Gas Pressure Reducing Valves
gauge option on the valve outlet, please note that
the outlet pressure as registered on the gauge
may be slightly higher than a gauge located downstream.
4. All installations should include a downstream relief
device if the inlet pressure could exceed the pressure rating of any downstream equipment or the
maximum outlet pressure rating of the unit.
5. Flow Direction: install so that the flow direction
matches the inlet/outlet marking on the main regulator body (1).
6. For best performance, install in well drained horizontal pipe.
7. Basic regulator - regulator may be rotated around
the pipe axis 360°. Recommended position is with
adjusting screw (24) vertical upwards.
8. Regulators are not to be buried underground.
9. For insulated piping systems, recommendation is to
not insulate regulator.
Principles of Operation
To Drain
To Drain
Preferred Installation
Caution! Installation of adequate overpressure protection is recommended to protect the regulator from
overpressure and all downstream equipment from
damage in the event of regulator failure.
1. An inlet block valve should always be installed.
2. If service application is continuous such that shutdown is not readily accomplished, it is recommended that an inlet block valve, outlet block valve, and
a manual bypass valve be installed.
3. An outlet pressure gauge should be located approximately ten pipe diameters downstream, and
within sight. If you have ordered your JR with outlet
1. Movement occurs as pressure variations register on
the piston (4). The registering pressure is the outlet,
P2, or downstream pressure. The range spring (12)
opposes piston (4) movement. As outlet pressure
drops, the range spring (12) pushes the piston (4)
down, opening the port; as outlet pressure increases, the piston (4) pushes up and the port opening
closes.
2. A complete piston seal (19 & 27 ) failure will cause
the regulator to fail open.
Start Up
Caution! Don’t not exceed the maximum rated pressure of the regulator if installed for a hydrostatic test.
Isolate the unit if the test is above the valve rating.
1. Start with the block valves closed. A bypass valve
may be used to maintain outlet pressure in the
downstream system without changing the following
steps.
2. Relax the range spring (12) by turning the adjusting
screw (24) counter-clockwise (CCW) until there is
no noticeable spring tension.
Page 2
3. If it is a “hot” piping system, and equipped with a
bypass valve, slowly open the bypass valve to preheat the system piping and to allow slow expansion
of the piping. Closely monitor outlet (downstream)
pressure via gauge to ensure no over-pressurizing.
Note: if no bypass valve is installed, extra caution
should be used in starting up a cold system; i.e. do
everything slowly.
4. Crack open the outlet (downstream) block valve.
5. Slowly open the inlet (upstream) block valve observing the outlet (downstream) pressure gauge.
Determine if the regulator is flowing. If not, slowly
rotate the regulator adjusting screw (24) clockwise
(CW) until flow begins.
6. Continue to slowly open the inlet (upstream) block
valve until fully open.
7. Continue to slowly open the outlet (downstream)
block valve, especially when the downstream piping
isn’t pressurized. If the outlet (downstream) pressure exceeds the desired pressure, close the block
valve and go to Step 2, then return to Step 4.
8. When flow is established steady enough that the
outlet (downstream) block is fully open, begin to
slowly close the bypass valve if installed.
9. Develop system flow to a level near its expected
normal rate, and reset the regulator set point by
turning the adjusting screw (24) CW to increase
outlet pressure, or CCW to reduce outlet pressure. .
10. Reduce system flow to a minimum level and observe set point. Outlet pressure will rise from the
set point of Step 9.
Shutdown
1. On systems with a bypass valve, and where system pressure is to be maintained as the regulator
is shutdown, slowly open the bypass valve while
closing the inlet (upstream) block valve. (When on
bypass, the system pressure must be constantly
observed and manually regulated.) Close the outlet
(downstream) block valve. CAUTION! Do not walk
away and leave a bypassed regulator unattended.
2. If the regulator and system are to both be shut
down, slowly close the inlet (upstream) block valve.
Close the outlet (downstream) valve only if regulator
removal is required.
Standard Repair Kit Parts are identified on the parts
listing by an ** after the item number. LowFlow Valve
recommends that all of these parts be replaced during
servicing.
Maintenance
Valve Disassembly
1. Remove adjusting knob (24).
2. Remove SHCS (16), and lift off spring housing (2).
3. Remove upper spring guide (9), range spring (12),
and lower spring guide (10).
4. Lift piston (4) and cylinder (3) out of body (1).
5. Remove piston (4) by pushing downward through
the cylinder (3).
6. Remove all o-rings (17, 27) and back up ring (19)
from the cylinder (3).
7. Remove the bottom cap (7).
8. Remove the plug (8), return spring (13), plug o-ring
(25), and plug back up ring (20).
9. Turn the body (1) upside down and remove the seat
holder (5), soft seat (6), and o-ring (18).
Valve Reassembly
1. Install the backup ring (19), and o-ring (27) into the
cylinder (3). The back up ring should be toward the
smallest I.D. Bore and the o-ring toward the largest
I.D. bore.
2. Install the piston (4) into the cylinder (3). Install the
large o-ring (17) into the groove in the bottom of
the cylinder (4).
3. Place the piston/cylinder into the body (1).
4. Place the lower spring guide (10) over the top of
the piston (4).
5. Place the range spring (12) and upper spring guide
(9) onto the lower spring guide (10).
6. Replace the spring housing (2) and thread the
SHCS (16) into the body (1).
7. Cross torque to 200 in/lbs.
8. Install the o-ring (18) onto the seat holder (5), and
the soft seat (with the red dot facing down (6) into
the seat holder. Turn body upside down and install
the seat assembly into the body (1).
9. Set the bottom cap (7) upright. Install the outer
back up ring (23), and the outer o-ring (26) onto the
O.D. of the part.
10. Install the back up ring (20), o-ring (25) onto the
plug (8). Install return spring (13).
11. Carefully install the plug (8) in the bottom cap making sure the tail (big end) of the plug slides through
the I.D. of all the parts that have been assembled
into the bottom cap.
12. Carefully install the bottom cap assembly into
the valve making sure the top of the plug passes
through the hole in the body, and that the outer
o-ring and back up ring pass into the body bore
evenly.
13. Tighten the bottom cap (7) until a positive mechanical stop is felt.
14. Thread the adjusting knob (24) into the spring
housing (2). The valve is now ready for service.
-2-
Page 3
Troubleshooting
If You Experience Erratic Operation; Chattering:
A. Oversize regulator; inadequate rangeability
1. Check actuator flow conditions, re-size regulator for minimum and maximum flow.
2. Increase flow rate.
3. Decrease regulator pressure drop; decrease
inlet pressure by placing a throttling orifice in
inlet piping.
4. Install next step higher range spring. Before
replacing regulator, contact factory.
B. Worn plug or seat; inadequate guiding. Replace
trim (possible body replacement).
C. Weakened/broken return spring. Determine if cor-
rosion is causing plug to not move freely. Replace
return spring.
If the Regulator can’t pass sufficient flow:
A. Regulator not closing tightly. Inspect plug and seat
sub-assembly, replace if worn.
B. Downstream blockage
1. Check system; isolate (block flow at regulator
inlet not outlet).
2. Relocate regulator if necessary
C. No pressure relief protection. Install safety relief
valve, or rupture disc.
D. Restricted piston movement. Ensure no moisture in
spring chamber at temperature below free point.
Page 4
Illustration & Parts List
24
9
12
10
4
2
19
27
16
A
1
3
B
Detail D
19
27
17a
17b
1
25
20
18
8
5
26
6
B
Detail C
B
Detail B
A
Vent port (if present)
1
over outlet
25
20
26
23
7
13
Section A-A
Item # Description Quantity Item # Description Quantity
1 Body 1 16 SHCS 6*
2 Spring Housing 1 17a** O-Ring, -122 (for 1/2”) 245265-* 1
3 Cylinder 1 17b** O-Ring, -129 (for 3/4”-1”) 85377-* 1
4 Piston 1 18** O-Ring, -65199-* 1
5** Seat 1 19** Back up Ring 24262-* 1
6** Soft Seat 1 20** Split Ring 24725-* 1
7 Bottom Cap 1 23** Back-up Ring 24262-* 1
8** Plug 1 24 Adjusting Knob 1
9 Upper Spring Guide 1 25** O-Ring 65200-* 1
10 Lower Spring Guide 1 26** O-Ring 92423-* 1
12 Range Spring 1 27** O-Ring 24445-* 1
13** Return Spring 1
* Quantity of 8 on 3/4”-1” Model
** Standard Repair Kit Parts
23
Bulletin IM-JRPH-1113
3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
lowfl[email protected] • www.lowflowvalve.com
Loading...