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14" and Larger Wafer and Lug Style
Dual Disc
Operation, Maintenance and
INTRODUCTION ............................................ 1
RECEIVING AND STORAGE ......................... 1
DESCRIPTION OF OPERATION ................... 1
INSTALLATION .............................................. 2
VALVE CONSTRUCTION .............................. 3
MAINTENANCE ............................................. 5
TROUBLESHOOTING ................................... 5
DISASSEMBLY .............................................. 5
REASSEMBLY ............................................... 5
PARTS AND SERVICE .................................. 6
WARRANTY ................................................... 6
Installation Manual
VAL-MATIC
9 05 R i ver s id e D r .
Phone (630) 941-7600 ●
www.valmatic.com
Check Valve
®
VALVE AND MANUFACTURING CORP.
●
Elmhurs t, IL 60126
Manual No.
DDCV-OM2-2
Fax (630) 941-8042
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Summary of Contents for Val-Matic Dual Disc Check Valve
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Page 1: Table Of Contents
DISASSEMBLY ..........5 REASSEMBLY ..........5 PARTS AND SERVICE ........6 WARRANTY ........... 6 ® VAL-MATIC VALVE AND MANUFACTURING CORP. 9 05 R i ver s id e D r . ● Elmhurs t, IL 60126 Phone (630) 941-7600 ●... -
Page 2: Introduction
This valve is not intended for fluids containing suspended solids such as wastewater. wastewater and other high turbidity applications, use ® Val-Matic Series 500 Swing-Flex Check Valves. FIGURE 1. DUAL DISC CHECK VALVE CAUTION... -
Page 3: Installation
INSTALLATION The installation of the valve is important for its proper operation. The flow arrow on the valve body or nameplate must point in the direction of flow when the system is in operation. The valve can be installed in horizontal or vertical lines with the flow Valves for air service (Series 8900) require special springs to allow full valve opening. -
Page 4: Valve Construction
VALVE CONSTRUCTION (14”- 30”) The standard check valve body (1) is constructed of cast 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 discs (2) and torsion spring (3) only moving parts and require no... - Page 5 VALVE CONSTRUCTION (36”- 60”) The standard check valve body (1) is constructed of cast 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 discs (2) and torsion spring (3A and 3B) are the only moving parts and require no maintenance or lubrication.
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Page 6: Maintenance
MAINTENANCE 3. Drive out the pins (4 and 5) with a round bar or Dual Disc Check Valves require no scheduled punch while pressing down on the spring (3) to lubrication of maintenance. prevent it from unwinding. Valve 18” and larger have 2 springs and require extreme care to INSPECTION: Periodic inspection for leakage can prevent rapid uncoiling of the spring during... -
Page 7: Parts And Service
Valve Size and Model Number located on the valve centered in the body and the disc should rotate nameplate and contact: without binding. Val-Matic Valve and Manufacturing Corp. 6. Insert the disc stop pin (5) into the holes in the 905 Riverside Drive body.