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INSTALLATION, OPERATION & MAINTENANCE MANUAL

IOM-C-PRV

12-13

MODEL C-PRV

PRESSURE REDUCING REGULATOR

SECTION I

I. DESCRIPTION AND SCOPE

Model C-PRV is a pressure regulator used to control downstream (outlet or P

) pressure. Inlet and outlet sizes

are 1", 1-1/2", 2" and 3" with Tri-Clamp

ﬁ tting connections. This regulator is only suitable for liquids and gases at

temperatures less than 300°F (149°C). Refer to Technical Bulletin C-PRV-TB for speciﬁ c design con di tions.

SECTION II

II. INSTALLATION

A. General:

1. An inlet block valve should always be installed

up stream of the regulator.

2. An outlet pressure gauge should be located

ap prox i mate ly ten pipe diameters down stream

and within sight.

3. All installations should include a downstream

re lief device if the inlet pressure could exceed

the pressure rating of any downstream equip-

ment.

4. Flow Direction: Install so ﬂ ow enters through

the bottom connection and exits the side con-

nection.

5. Install with spring chamber (2) in the vertical

up position to allow for proper draining.

A. General:

1. Ensure that lock-open pin (10) and hitch pin

(15) are in proper po si tion. See Sec tion VII.

2. Conﬁ rm that the proper range spring is in di -

cat ed to be within the regulator by inspection

of the unit’s nameplate. Apply setpoint pres-

sures that are only within the stated range.

SECTION IV

IV. START-UP

III. PRINCIPLE OF OPERATION

A. General:

1. Movement occurs as pressure vari a tions reg is-

ter on the di a phragm. The registering pres sure

is the outlet, P

or downstream pres sure. The

range spring op pos es diaphragm move ment.

As the outlet pressure drops, the range spring

pushes the diaphragm down, opening the port;

as outlet pressure increases, the diaphragm

pushes up and the port opening closes.

2. A complete diaphragm failure will cause the

reg u la tor to fail open

SECTION III

CAUTION

Installation of adequate overpressure pro tec tion is

recommended to pro tect the reg u la tor from overpres-

sure and all down stream equip ment from damage

in the event of regulator failure.

CAUTION

The Model C-PRV should never be used as a shutoff

device.

Summary of content (8 pages)

PAGE 1
INSTALLATION, OPERATION & MAINTENANCE MANUAL MODEL C-PRV IOM-C-PRV 12-13 PRESSURE REDUCING REGULATOR SECTION I I. DESCRIPTION AND SCOPE Model C-PRV is a pressure regulator used to control downstream (outlet or P2) pressure. Inlet and outlet sizes are 1", 1-1/2", 2" and 3" with Tri-Clamp® fitting connections. This regulator is only suitable for liquids and gases at temperatures less than 300°F (149°C). Refer to Technical Bulletin C-PRV-TB for specific design conditions. SECTION II II. INSTALLATION A.
PAGE 2
3. When stating direction of rotation of the nut or handle (6), the view is with respect to looking down towards the spring chamber or its’ normal location. 6. Slowly open the inlet (upstream) block valve observing the outlet (downstream) pressure gauge. Determine if the regulator is flowing and the downstream equipment is operative. Rotate the regulator nut or handle (6) CW slowly until flow begins. 4. Start with the block valve closed. 5.
PAGE 3
CAUTION Do not apply spring load or operate regulator with hitch pin (15) removed from top of guide post (18). Premature diaphragm failure will result. 5. Loosen thumbclamp screw (13) and remove. a. For Opt-80: 2 piece clamp (13A): Loosen and remove clamp nuts (13B), washers (13D), bolts (13C) and clamps (13A). See Figure 1. 6. Place matchmarks between body (1) and spring chamber(2) to assist in final orientation when reassembled. 7.
PAGE 4
NOTE: Gap between clamp (13A) halves should be equal in size. See Figure 1. NOTE: Apply a small amount of Emhart Bostic White Food Grade “NEVER-SEEZ®” or equivalent to threads of adjusting screw (5) . 24. Align the two ribs inside the spring chamber (2) with the tabs (ears) on the spring button (4) and place the spring chamber (2) over assembled parts directly on body (1). Refer to step 6 previous for alignment of match marks for final orientation. 25.
PAGE 5
SECTION VIII VIII. ORDERING INFORMATION NEW REPLACEMENT UNIT vs PARTS "KIT" FOR FIELD REPAIR To obtain a quotation or place an order, please retrieve the Serial Number and Product Code that was stamped on the metal name plate and attached to the unit. This information can also be found on the Bill of Material ("BOM"), a parts list that was provided when unit was originally shipped. (Serial Number typically 6 digits).
PAGE 6
Figure 3 Forged Body shown above See the next page for Item Number Descriptions.
PAGE 7
Figure 4 1" Investment Cast Red. Port shown above NOTE: This product is to be installed with the spring chamber in the vertical position. Item No. 1 2 3 4 5 5.1 5.2 5.3 5.4 6 7 13 15 IOM-C-PRV Description Body Spring Chamber Pressure Plate Spring Button Adjusting Screw Adjusting Screw Cap Pin Adjusting Screw U-Cup Seal (2 pcs.) Nut - Handle Spring Clamp Pin (Cotterless Hitch) Item No. 16 17 18 19 20 21 22 24 26 27 Description Not Shown: Diaphragm Item No.
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Cashco, Inc. P.O. Box 6 Ellsworth, KS 67439-0006 PH (785) 472-4461 Fax. # (785) 472-3539 www.cashco.com email: sales@cashco.com Printed in U.S.A. IOM-C-PRV Cashco GmbH Handwerkerstrasse 15 15366 Hoppegarten, Germany PH +49 3342 4243135 Fax. No. +49 3342 4243136 www.cashco.com Email: germany@cashco.com Cashco do Brasil, Ltda. Al.Venus, 340 Indaiatuba - Sao Paulo, Brazil PH +55 11 99677 7177 Fax. No. www.cashco.com Email: brazil@cashco.