OPERATION AND MAINTENANCE MANUAL 05/2015
3
1 TECHNICAL DESCRIPTION
1.1 PRODUCT DESIGNATION AND IDENTIFICATION
The subject of this Operation and Maintenance Manual is:
TYPE 6534 flange-to-flange check flap valve.
- with flap (closure)
- with o-ring seals
- with body and flap wafer made of steel grade 1.4301 or 1.0038/Zn.
1.2 USE
The Type 6534 flange-to-flange check flap valves are intended for industrial installations, e.g. sewage
discharge, or water supply systems, e.g. for potable water. The valves are intended for overground
installations as installed in vertical or horizontal pipelines.
1.3 TECHNICAL SPECIFICATION
The Type 6534 flange-to-flange check flap valves are designed to transport potable water, process
water (sewage) and other liquids as approved by the manufacturer.
- Operating temperature: -10
°
C to +70
°
C
- Available diameters (dimensions): - DN40 – DN300[mm]
- Maximum medium flow rate:
- liquid: max. 4 [m/s]
- nominal pressure ratings (PN):
- 1.0 MPa
- 1.6 MPa
2 DESIGN
2.1 DESCRIPTION OF THE VALVE DESIGN
F.A. JAFAR S.A manufactures the Type 6534 flange-to-flange check flap valves for industrial and water
supply systems. The valve body is made of stainless steel or zinc-plated carbon steel and houses a wafer flap as
the valve closure. In the operating conditions, the flap is held at the top position (under the inner pipe wall) by
the dynamic force of the liquid stream, or in the closed position, where it seals off the valve seat under the back
pressure.
