Manual

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. The general details of
construction are illustrated in Figure 3.
4
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.
FIGURE 3. DUAL DISC
®
CHECK VALVE
TABLE 3. CHECK VALVE PARTS LIST
ITEM DESCRIPTION MATERIAL
1 Body Cast Iron
2 Disc Bronze
3A,3B Spring* Stainless Steel
4A Hinge Pin Stainless Steel
4B Shaft Collar Stainless Steel
5 Stop Pin Stainless Steel
6A Inner Bearing* Stainless Steel
6B Outer Bearing* Stainless Steel
7 Hinge Pin Ret.* Steel
8 Stop Pin Ret.* Steel
9 Stab. Sphere* Buna-N
10 O-Ring* Buna-N
*Recommended Spare Part
WARNING: Removal of mating flanges
without draining the pipeline may
cause injury or damage to the
valve.