Valve Construction - Val-Matic Dual Disc Check Valve Operation, Maintenance And Installation Manual

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)
are the only moving parts
maintenance or lubrication. The general details of
construction are illustrated in Figure 2.
The body (1) is either compact wafer style to fit
between two pipe flanges or lug style for bolting to
two pipe flanges. The resilient seat is bonded to the
body and is not adjustable or replaceable in the field.
WARNING
Removal of mating flanges without draining the
pipeline may cause injury or damage to the
valve.
FIGURE 2. DUAL DISC
and require no

CHECK VALVE
Table 2. Check Valve Parts List
Item Description
1 Body
2 Disc
Spring*
3
(qty. 2 springs on 18" and larger
4 Hinge Pin
Shaft Collar
4B
(Item 4B on 36" and larger sizes)
5 Stop Pin
6 Bearing*
7 Hinge Pin Ret.*
8 Stop Pin Ret.*
9 Stab. Sphere*
* Recommended Spare Part
3
Material
Cast Iron
Bronze
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Steel
Steel
Buna-N