Val-Matic Wafer and Globe Style Silent Check Valve - Manual (Page 5)

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.
The body (1) is either compact wafer style to fit
between two pipe flanges or flanged style for
connection to two pipe flanges. The globe style
valve seat (2) is retained in the body (1) with screws
(6) to allow assembly in the pipeline. The wafer
style valve seat and the 2-1/2” globe style seat are
threaded seats where no seat screws (6) are used.
The seat screws will not retain the seat against full
pressure. The mating flange must properly retain
the seat. Do not remove the upstream flange while
the pipeline is full of water or the seat (2) may
become dislodged from the body.
FIGURE 4. WAFER STYLE CHECK VALVE
TABLE 2. CHECK VALVE PARTS LIST
MAINTENANCE
Silent Check Valves require no scheduled lubrication
or maintenance.
INSPECTION: Periodic inspection for leakage can
be performed by listening for leakage noise from the
valve while the pump is shut down. If leakage is
heard, drain the pipeline, remove the valve, and
inspect the seating surfaces for wear or mineral
deposits. Clean, lap, or repair trim as needed.
WARNING: Removal of mating flanges
without draining the pipeline may
cause injury or damage to the
valve.
ITEM DESCRIPTION MATERIAL
1 Body Cast Iron
2 Seat
1
Bronze or SS
3 Disc
1
Bronze or SS
(Optional Resilient)
4 Spring
1
Stainless Steel
5 Bushing
1
Bronze
6
2
Screw
1
Stainless Steel
6
3
O-Ring
1
EPDM
1. Recommended Spare Part
2. Globe style valve
3. Wafer style valve
4