INSTALLATION:

First check interior of valve through end of bore for foreign objects.

HORIZONTAL: Valve should be installed with inlet and outlet at same level for proper clapper action.

VERTICAL: For flaw up, valve should be installed with clapper end down. For flow dawn, valve should be installed with clapper end up.

NOTE: All valves designed for horizontal service unless specified for vertical service.

End connections and mating pipe should be cleaned thoroughly prior to assembly. Proper support of valve and/or pipe should be provided to eliminate end strain and fatigue of end connections.

Working pressure should not be exceeded in service. All valves have been hydrostatically tested to 1-1/2 times the rated working pressure. Operating temperature should not exceed 200F continuous or 2500 F for short periods unless specified for such when purchased.

MAINTENANCE: Valves require minimum of maintenance due to simplicity of design. Recommended spare parts kit consists of clapper, clapper seal, clapper pin and bushings and spare cover seal. Seat ring is required if valve has a three-digit figure number.

To inspect check valve:

• Remove cover
• Lift clapper assembly out of valve hanger section
• Inspect seals for foreign material, nicks and/or gouges
• Check to be sure that clapper bushings are free to roll on clapper pin
• Check hanger section and body seat face for wear
• Reassemble in reverse order

REPAIR PARTS: When ordering replacement parts specify:

1. Valve Size
2. Clapper seal material
3. Working pressure
4. Type of service
5. Material (valve body)
6. Figure number
7. Casting numbers
8. Type of cover