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Manual No.

SCV-OM1-2

Wafer and Globe Style

Silent Check Valve

Operation, Maintenance and

Installation Manual

INTRODUCTION.................................... 1

RECEIVING AND STORAGE................. 1

DESCRIPTION OF OPERATION........... 1

INSTALLATION...................................... 2

DRAWING SS-974F............................... 3

VALVE CONSTRUCTION...................... 4

MAINTENANCE ..................................... 4

TROUBLESHOOTING ........................... 5

DISASSEMBLY ...................................... 5

REASSEMBLY ....................................... 5

PARTS AND SERVICE .......................... 6

WARRANTY........................................... 6

VAL-MATIC

VALVE AND MANUFACTURING CORP.

905 RIVERSIDE DR. ELMHURST, IL. 60126

TEL. 630 / 941-7600 FAX. 630 / 941-8042

Summary of content (7 pages)

PAGE 1
Manual No. SCV-OM1-2 Wafer and Globe Style Silent Check Valve Operation, Maintenance and Installation Manual INTRODUCTION .................................... 1 RECEIVING AND STORAGE................. 1 DESCRIPTION OF OPERATION........... 1 INSTALLATION ...................................... 2 DRAWING SS-974F ............................... 3 VALVE CONSTRUCTION ...................... 4 MAINTENANCE ..................................... 4 TROUBLESHOOTING ........................... 5 DISASSEMBLY ............
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WAFER AND GLOBE-STYLE SILENT CHECK VALVE OPERATION, MAINTENANCE AND INSTALLATION INTRODUCTION This manual will provide you with the information to properly install and maintain the valve to ensure a long service life. The Silent Check Valve is ruggedly constructed with bronze or stainless steel trim to give years of trouble free operation. The valve should be installed in horizontal or vertical pipes carrying clean water.
PAGE 3
ADJACENT VALVES: When mating the check valve with butterfly isolation valves, the clearance between the butterfly disc and the fully open check valve stem must be checked. The location of the stem is also shown on the check valve submittal drawings. 10 inch and smaller flanged end check valves have sufficient clearance for most butterfly valves. However, on 12 inch and larger valves, the plug shaft extends beyond the flange face and may interfere with the operation of adjacent valves.
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3
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FIGURE 3. GLOBE STYLE CHECK VALVE VALVE CONSTRUCTION The standard check valve body (1) is constructed of iron. See the specific Materials List submitted for the order if other than standard iron construction. The internal metal components are bronze or stainless steel. The disc (3) and spring (4) are the only moving parts and require no maintenance or lubrication. The general details of construction are illustrated in Figures 2 and 3. FIGURE 4.
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TROUBLESHOOTING 3. Flip the seat (2) over and inspect the seating surface. Some minor dents and discoloration are normal. Grooves or wear areas will cause leakage and requires seat replacement. Note: Replace seat if the optional resilient seat o-ring is worn or damaged. Several problems and solutions are presented below to assist you in trouble shooting the valve assembly in an efficient manner. • Valve Chatters or Vibrates: Verify that velocity is at least 4 feet per second.
PAGE 7
PARTS AND SERVICE Parts and service are available from your local representative or the factory. Make note of the Valve Size and Model Number located on the valve nameplate and contact: Val-Matic Valve and Manufacturing Corp. 905 Riverside Drive Elmhurst, IL 60126 Phone: (630) 941-7600 Fax: (630) 941-8042 www.valmatic.com A sales representative will quote prices for parts or arrange for service as needed.