Manual

ManualsBrandsCashco ManualsSensors345

CAUTION

Installation of adequate overpressure pro tec tion is recom-

mended 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 345

PRESSURE REDUCING REGULATOR

SECTION II

II. INSTALLATION

1. An inlet block valve should always be installed.

2. If service application is continuous such that

shut down is not readily accomplished, it is rec-

ommended that an inlet block valve, outlet block

valve, and a manual bypass valve be installed.

3. Pipe unions should be installed to allow removal

from piping.

4. An outlet pressure gauge should be located ap-

proxi mately ten pipe diameters downstream, and

within sight.

5. All installations should include a downstream re-

lief device if the inlet pressure could exceed the

pres sure rating of any downstream equip ment or

the maximum outlet pressure rating of the unit.

SECTION I

I. DESCRIPTION AND SCOPE

The Model 345 is a diaphragmless, heavy duty, high pressure reducing regulator used to control downstream (outlet

or P

) pres sure. Sizes are1/2", 3/4", 1" (DN15, 20, and 25 ). With proper trim utilization, the unit is suitable for liquid

and gase ous service. Refer to Tech ni cal Bulletin 345-TB for design conditions and selection recommendations.

NOT FOR STEAM SERVICE.

IOM-345

12-13

INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)

DO NOT HYDROSTATIC TEST THRU AN IN STALLED

UNIT; ISOLATE REGU LA TOR FROM TEST. Internal

me chani cal damage could re sult. Refer to Technical

Bulletin Model 345, Table 5 for "emergency over pres sure

level" that will not do ir re pair able dam age. In ad di tion,

note on name plate that Inlet and Outlet pres sure ratings

are at dif fer ent levels.

CAUTION

8. Flow Direction: Install so the ﬂ ow direction match-

es the arrow cast on the main regulator body.

9. Basic Regulator - (Refer to Figure 1): Regu la tor

may be rotated around the pipe axis 360

. Rec om-

mended position is with spring chamber vertical

upwards. Orient such that the spring cham ber

vent hole does not collect rainwater or debris.

10. Regulators are not to be direct buried under-

ground.

6. Clean the piping of all foreign material including

chips, welding scale, oil, grease and dirt before

installing the regulator. Strainers are rec om -

mended.

7. In placing thread sealant on pipe ends prior to

en gage ment, assure that excess material is re-

moved and not allowed to enter the regulator upon

startup.

CAUTION

For welded installations, all internal trim parts, seals and

diaphragm(s) must be removed from regulator body prior to

welding into pipelne. The heat of fusion welding will dam-

age non-metallic parts if not removed. NOTE: This does

not apply to units equipped with extended pipe nipples.

Summary of content (8 pages)

PAGE 1
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM) IOM-345 12-13 MODEL 345 PRESSURE REDUCING REGULATOR SECTION I I. DESCRIPTION AND SCOPE The Model 345 is a diaphragmless, heavy duty, high pressure reducing regulator used to control downstream (outlet or P2) pressure. Sizes are1/2", 3/4", 1" (DN15, 20, and 25 ). With proper trim utilization, the unit is suitable for liquid and gaseous service. Refer to Technical Bulletin 345-TB for design conditions and selection recommendations. NOT FOR STEAM SERVICE.
PAGE 2
SECTION III III. PRINCIPLE OF OPERATION Movement occurs as pressure variations register on the pressure piston. The registering pressure is the outlet, P2, or downstream pressure. The range spring opposes pressure piston movement. As outlet pressure drops, the range spring pushes the pressure piston down, opening the port; as outlet pressure increases, the pressure piston pushes up and the port opening closes. SECTION IV IV. STARTUP 1. Start with the block valves closed.
PAGE 3
SECTION VI VI. MAINTENANCE: WARNING SYSTEM UNDER PRESSURE. Prior to performing any maintenance, isolate the regulator from the system and relieve all pressure. Failure to do so could result in personal injury. A. General: 1. Maintenance procedures hereinafter are based upon removal of the regulator unit from the pipeline where installed. 2. Owner should refer to owner's procedures for removal, handling, cleaning and disposal of nonreuseable parts, i.e. gaskets, etc. 3.
PAGE 4
11. Bench test unit for suitable operation. NOTE: Regulators are not tight shutoff devices. Even if pressure builds up beyond set point, a regulator may or may not develop bubble tight shutoff. In general, tighter shutoff can be expected with composition seat. c. 2. To check for seat leakage, follow same steps as listed under Pressure Piston/O-ring Inspection/Replacement, except for the following guidelines: 12. Soap test around body cap (5) and body(1) for leakage.
PAGE 5
3. Downstream Pressure will not reach desired setting. Possible Causes Remedies A. Regulator undersized. A1. Confirm by opening bypass valve together with regulator. A2. Check actual flow conditions, re-size regulator; if regulator has inadequate capacity, replace with larger unit. B. Plugged trim. B. Remove trim and check for plugged holes in cylinder. C. Incorrect range spring (screwing in CW of adjusting screw does not allow bringing pressure level up to proper level). C.
PAGE 6
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 7
Figure 2: Composition Seat Design Figure 1: Basic Model 345 with metal seat design. Item No.Description 1 Body 2 Spring Chamber 3 Pressure Piston 4 Spring Button 5 Body Cap 6 Adjusting Screw 7 Set Screw 8 T-Bar Handle 9 Thrust Bearing 10 Name Plate 11 Body Quad Ring ‡ 12 Body Backup Ring ‡ Item No. 13 14 15 15.1 15.
PAGE 8
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-345 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.