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I. DESCRIPTION AND SCOPE
Model PGR-2 is a pressure reducing regulator used to control downstream (outlet or P2) pressure. Sizes are
3/8" (DN10), 1/2" (DN15), 3/4" (DN20), 1". This model is applied primarily in gaseous service.
II. REFERENCES
Refer to Technical Bulletin PGR-2-TB for tech ni cal
specifications for this reg u la tor.
III. INSTALLATION
1. Regulator may be rotated around pipe axis 360
degrees. For ease of maintenance, the rec om-
mend ed position is with the cover dome (2)
up wards.
2. Provide space below, above, and around reg u la-
tor for removal of parts during maintenance.
3. Install block valves and pressure gauges to pro-
vide means for adjustment, operation, bypass,
or removal of the regulator. A pipeline strainer
is recommended before inlet to remove typical
pipe line debris from entering valve and damaging
internal "soft goods", primarily the dynamic seal.
4. The PGR-2 is designed to regulate pressure
via external sensing. Use 3/8" or 1/2" (DN10 or
DN15) outer di am e ter tubing to connect the sens-
ing port on the pilot to the piping down stream of
the main regulator. If PGR-2 is constructed with
self contained feature - tubing and connection in
downstream piping is not required.
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
MODEL PGR-2
PRESSURE LOADED
PRESSURE REDUCING REGULATOR
SECTION I
SECTION II
SECTION III
ABBREVIATIONS
CW
–
CCW –
ITA
–
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.
Model PGR-2
IOM-PGR-2
Clockwise
Counter Clockwise
Inner Trim Assembly
CAUTION
10-22
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Related Manuals for cashco PGR-2
Summary of Contents for cashco PGR-2
- Page 1 SECTION I I. DESCRIPTION AND SCOPE Model PGR-2 is a pressure reducing regulator used to control downstream (outlet or P2) pressure. Sizes are 3/8" (DN10), 1/2" (DN15), 3/4" (DN20), 1". This model is applied primarily in gaseous service. SECTION II II.
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Page 2: Principle Of Operation
Step. The max i mum rise 6. Slowly open the inlet (upstream) block valve to in outlet pres sure on de creas ing flow should not about 25% open. Rotate the adjusting screw exceed the 10%. If it does, consult factory. IOM-PGR-2... -
Page 3: Maintenance
Cashco cleaning parts. Only use original equipment parts standard #S-1134. sup plied by Cashco for re build ing or re pair- ing reg u la tors. Position diaphragm(s) (12) into place. Vi su al ly center pres sure plate (3) onto diaphragm(s) 4. - Page 4 NOTE: On regulators originally supplied as nect the inlet filter to the stabilizer, the cover “oxygen clean”, Option 55, maintenance must include a level of clean li ness equal to Cashco dome to the metering valve and the outlet of cleaning stan dard #S-1134.
- Page 5 (2). Engage again in vise with the bolt flange facing up. the final two nuts (24) and secure tight. 5. Insert the stem (30.8) into the center hole of the body and the seat (30.7), square end first. IOM-PGR-2...
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Page 6: Diaphragm Replacement
Shut down system in accordance Section VI. 7. Clean all re us able metal parts according to owner's pro ce dures. 2. Owner should refer to owner's procedures IOM-PGR-2... - Page 7 NOTE: Pis ton (60.14) assembly is a com- 8. Reassemble diaphragm subassembly by po si tion seat, Cashco, Inc. does not recom- plac ing pusher plate seal (60.13) over mend at tempt ing to remove the com po si- thread ed post of pusher plate (60.4), placing tion seat.
- Page 8 20-80 psig (1.4- 5.5 Barg) range spring, 50 psig (3.4 Barg) test pres sure min i mum. IOM-PGR-2...
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Page 9: Troubleshooting Guide
Confirm torque value in accordance with Section VII, F-13. correct value. Diaphragm continually breaks (all regulators). Possible Causes Remedies Differential pressure across diaphragm may A1. Be aware of limits as well as where the various pressures are acting. have exceeded limits. Install pressure safety equipment as necessary. IOM-PGR-2... -
Page 10: New Replacement Unit
(last digit is alpha character that reflects revision level for the product). PARTS "KIT" for FIELD REPAIR: – – Contact your local Cashco, Inc., Sales Rep re sen- ta tive with the Serial Number and Product code. NEW REPLACEMENT UNIT: Identify the parts and the quantity required to repair the unit from the "BOM"... -
Page 11: Assembled View
STABILIZER Assembled View The PGR-2 is designed for external sensing. Use 3/8" or 1/2" (DN10 or DN15) outer di am e ter tubing to connect the pilot sensing port to a location in the piping down stream of the main regulator. - Page 12 Main Body Assembly Item No. Description Body Pressure Plate Body Cap Cap Screw (Flange Bolting) Nut (Hex) (Flange Bolting) Pusher Plate Diaphragm Piston Cylinder Piston Spring Cylinder Gasket Loading Chamber * Recommended Spare Parts IOM-PGR-2...
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Page 13: Pilot Assembly
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. product remains solely with the purchaser. - Page 14 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 USA IOM-PGR-2...
- Page 15 ATEX requires that all components and equipment be evaluated. Cashco pressure regulators are considered components. Based on the ATEX Directive, Cashco considers the location where the pressure regulators are installed to be classified Equipment-group II, Category 3 because flammable gases would only be present for a short period of time in the event of a leak.
- Page 16 If the above issues are addressed by selecting options that do not have potential sources of ignition, avoiding options that have not been assessed, and by taking the proper usage issue precautions, then Cashco regulators can be considered to be a mechanical device that does not have its own source of ignition and thus falls outside the scope of the ATEX directive.
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