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cashco POSR-1 Installation, Operation & Maintenance Manual

Pilot operated pressure re duc ing regulator
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ISO Registered Company
PILOT OPERATED PRESSURE RE DUC ING REGULATOR
. DESCRIPTION AND SCOPE
I
The POSR-1 is a pilot operated pressure reducing reg u la tor used to control downstream (P
POSR-1-20 is a pressure loaded (no pilot) option. Sizes are 1/2", 3/4" and 1" (DN15, 20 and 25). The unit is suitable
for steam service only. Refer to Technical Bulletin POSR-1-TB for design conditions and selection recommendations.
NOT RECOMMENDED FOR DEAD END SERVICE!
II. INSTALLATION
A. General:
Do not dead end (no flow demand) downstream of POSR-1
if P
- Inlet Pressure is greater than max i mum allowable
1
outlet design pressure.
Spring Range
5-15 psig (0.34-1.03 Barg)
10-40 psig (0.69-2.8 Barg)
30-80 psig (2.1-5.5 Barg)
70-150 psig (4.8-10.3 Barg)
B. Piping the Valve:
1. An inlet block valve should always be in stalled.
2. If service application is continuous such that
shut down is not readily accomplished, it is
recommended that an inlet block valve, outlet
block valve, and a manual bypass valve be
installed.
3. Pipe unions are recommended for NPT
screwed in stal la tions to allow removal from
piping.
4. An outlet pressure gauge should be lo cat ed
ap prox i mate ly ten pipe diameters down stream,
and within sight.
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
MODEL POSR-1
WARNING
Max. Allowable
Out let Pressure
100 psig (6.9 Barg)
200 psig (13.8 Barg)
200 psig (13.8 Barg)
200 psig (13.8 Barg)
SECTION I
SECTION II
TR
HP Cond.
Recommended Piping Schematic for POSR-1
TR
HP Cond.
Recommended Piping Schematic for POSR-1-20
Installation of adequate overpressure pro tec tion is
recommended to pro tect the reg u la tor from overpressure
and all down stream equip ment from damage in the event
of regulator failure.
Pilot
Valve
Main
Valve
TR
MP/LP Cond.
FIGURE 1
Airset or
Air
Manual Loader
Supply
Main
Valve
TR
MP/LP Cond.
FIGURE 2
CAUTION
IOM-POSR-1
02-16
) pressure. The
2
PI
SRV
PI
SRV

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Summary of Contents for cashco POSR-1

  • Page 1 ) pressure. The POSR-1-20 is a pressure loaded (no pilot) option. Sizes are 1/2", 3/4" and 1" (DN15, 20 and 25). The unit is suitable for steam service only. Refer to Technical Bulletin POSR-1-TB for design conditions and selection recommendations.

  • Page 2: Principle Of Operation

    NOTE: The POSR-1-20 does not require a sensing line. CAUTION 10. For best per for mance Cashco rec om mends in stall ing regulator in a well drained horizontal DO NOT HYDROSTATIC TEST THROUGH AN IN STALLED UNIT, INCLUDING PILOT;...
  • Page 3 (viewed from above) a minimum of three begins. (3) full revolutions. This reduces the outlet (down stream) pressure setpoint. For POSR-1-20 in crease load ing pres sure until flow begins. For POSR-1-20 use manual loading valve to set minimum loading pressure.

  • Page 4: Maintenance

    2. If the regulator and system are to both be POSR-1 is shut down, slowly open the by pass shut down, slowly close the inlet (up stream) block valve. Close the out let (down stream) valve while closing the inlet (up stream) block valve.
  • Page 5 Discard both diaphragm(s) (12) and gas ket which can affect the overall operation of the (13). POSR-1. Install an upstream strainer if scale or debris ap pears at this point. Using a 7/8" deep well socket, remove bel lows (11) by rotating CCW (viewed from above).
  • Page 6 (7) with body cap (9) recess. Rotate body cap (9) CW (viewed from above) until 39. Place remaining bolts (17) through spring shouldering on body (1). Hammer rap wrench cham ber (2) bolt hole openings. Engage all handle to ensure tightness. IOM-POSR-1...
  • Page 7 (19), tubing (21), and tubing fittings (20). threads and screw into body (1). When body cap (4) shoulder is resting fully down against body (1), use a wrench with 15" lever handle and a hammer to impact the body cap (4) tight IOM-POSR-1...

  • Page 8: Leak Testing

    A. General: 1. Disconnect tubing (21) that connects the pilot valve (PV) body (1) to the main valve (MV) 1. A POSR-1 is a metal-to-metal seated de sign loading chamber (2). with standard hardened trim in main valve (MV) and pilot valve (PV).

  • Page 9: Troubleshooting Guide

    Clogged pilot valve screen. Clean or replace. Blowdown inlet drip leg. Install upstream strainer, if severe. Regulator oversized for flow conditions. Install correct size. Insufficiently sloped line. Move tap from top of pipe to side; or, increase sensing tube to 3/8" OD. IOM-POSR-1...

  • Page 10: New Replacement Unit

    Cashco, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Cashco, Inc.
  • Page 11 FIGURE 3 MV – MAIN VALVE POSR-1 & POSR-1-20 DESCRIPTION ITEM NO. DE SCRIP TION ITEM NO. Body Diaphragm Gasket Loading Chamber Cap Screw Cylinder/Piston Sub as sem bly Cylinder Nameplate Piston Drive Screw Body Cap Pipe Plug Spring Cylinder Gasket...
  • Page 12 Indaiatuba - Sao Paulo, Brazil PH (785) 472-4461 PH +49 3342 30968 0 PH +55 11 99677 7177 Fax. # (785) 472-3539 Fax. No. +49 3342 30968 29 Fax. No. www.cashco.com www.cashco.com www.cashco.com email: sales@cashco.com email: germany@cashco.com email: brazil@cashco.com Printed in U.S.A. IOM-POSR-1...

This manual is also suitable for:

Posr-1-20

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