Description
In some applications, a Slip-on Tideflex® Duckbill Check Valve (TF-1) is not feasible because of an existing mating flange or wall thimble, or a flanged connection is preferred, or it is desired to mount the valve directly to a concrete wall. In these cases, the CTF – Series 35-1 Flanged Duckbill Check Valve is the solution.
Series 35-1 Check Valves are manufactured similarly to the Tideflex® TF-1 Check Valve, with the addition of an integral elastomeric flange. The flange size drilling conforms to ASME Class 125/150# and is also available with DIN drillings and other standard or customized drilling patterns. All Series 35-1 Check Valves are furnished complete with retaining rings for installation.
Specifications
Size Range: 4” / DN100 – 72” / DN1800
Drilling patterns:
-
- ASME Class 125/150#
- DIN PN6, PN10, PN16
- Custom
Features:
- Reliable backflow prevention
- Minimal bottom clearance required
- 100% elastomer construction virtually eliminates maintenance
- Will not corrode, warp or freeze open or shut
- 1 to 2” cracking pressure, low head loss
- Curved bill enhances sealing around debris
- Custom built for each application based on pressure and flow conditions
Materials Of Construction:
Elastomers:
Natural Rubber (NR), Ethylene Propylene Diene Terpolymer (EPDM), Acrylonitrile-Butadiene (NBR), Fluoroelastomer (FKM), Chloroprene (CR), Chlorosulfonated Polyethylene (CSM), Chloro-Isobutylene Isoprene (CIIR), NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 certified EPDM
Retaining rings:
Galvanized steel (standard), 304 Stainless Steel, 316 Stainless Steel, Special alloys available
