Designed to bolt directly to existing flanges or new installations, flanges are drilled 150# standard. Other drilling standards are also available upon request.
All of the PTFE Pipe Expansion Joints Rubber Check Valves are available in a various selection of elastomers including NSF/ANSI 61 certified material and back pressure capabilities to suit most applications.
The PTFE Pipe Expansion Joints Rubber Check Valves will not freeze or deform and functions solely on the inlet and back pressure which will be present in each application.
Benefits of the PTFE Pipe Expansion Joints Rubber Check Valves:
- All rubber construction resists abrasive slurries.
- NSF61 is standard construction.
- Very quiet operation with no water hammer.
- Its unique design prevents backflow.
- Negligible maintenance and energy costs.
- Will not warp or freeze.
- Quick interchange with any flap type check valve.
- Available in sizes 1” – 96”
- Available with special I.D to suit concrete pipe.
Frequently Asked Questions
PTFE Pipe Expansion Joints” Rubber Check Valve.
1. Does the Pipe Expansion Joints rubber check valve have to be installed in a certain position?
3. What is “Back Pressure”?
When the PTFE Pipe Expansion Joints rubber check valve is submerged in a liquid it is subjected to external pressure. It is critical that the maximum depth that the valve will be submerged is specified as this will be considered the maximum back pressure that the valve will be subjected to.
4. What is the cracking pressure to allow the valve to open?
1”to 2” of water column over back pressure will normally drain a pipe.
5. What back pressures can the Pipe Expansion Joints rubber check valve withstand?
Back pressures are in direct relation to the size of the valve, on the smaller diameters it is acceptable to specify up to 200 psi of back pressure and on larger diameters a back pressure limitation would be approximately 12 psi. Each Pipe Expansion Joints rubber check valve is manufactured to the exact line pressure, back pressure and flow rates which we require from you for manufacture. PTFE Expansion Joints can even supply valves up to 650 psig utilizing internal back pressure supports.
6. What are the most common installations?
The PTFE Expansion Joints rubber check valve is bolted directly to a head wall replacing an existing flap gate.
7. Can I use the Pipe Expansion Joints rubber check valve on potable water applications?
The Pipe Expansion Joints rubber check valves are available with an ANSI/NSF-61certified elastomer. Due to the large demand for clean water and portable applications, this will eliminate the concerns commonly affiliated with contaminants or leaching of elastomers in potable water systems.
8. Can the PTFE Pipe Expansion Joints rubber check valve be installed on an “out of round” pipe?
Yes, please have the approximate dimensions from 4 different angles to provide proper sizing.
9. Can river currents and ocean waves damage the valves?
In most cases river currents and ocean waves will not damage the Pipe Expansion Joints rubber check valves, but if currents or waves in question are of an abnormal nature, it is suggested that side walls or rock pilings are utilized.
10. Can the PTFE Expansion Joints rubber check valve be used as a pressure relief valve?
No, the Pipe Expansion Joints rubber check valves have been designed to offer superior service as a back flow preventer and should not be considered for a pressure relief valve.
11. Can PTFE Pipe Expansion Joints make a special design to suit my requirements?
In most instances the Pipe Expansion Joints rubber check valve can be fabricated to suit different applications.
12. What types of elastomer is available?
The PTFE Pipe Expansion Joints rubber check valve can be manufactured and supplied to withstand almost any type of media. Most commonly supplied are Nitrile (nsf/ansi Standard 61 certified), Neoprene, Gum Rubber, Chlorobutyl and EPDM.
13. What types of materials are available for the backing rings and banding clamps?
14. Can the PTFE Pipe Expansion Joints supplied with special flanges or drilling?
Yes, the standard drilling pattern is ANSI 125/150# drilling, other drilling standards such as: ANSI 250/300#, BS-10, DIN NP-10 and DIN NP-16, JIS-5k and JIS-10K are available upon special request.
15. Can I install a PTFE Expansion Joints rubber check valve near a residential area?
Yes, one of the unique features of the Pipe Expansion Joints rubber check valve is the design of the bill section. While the bill will open and allow passage of fluid when head pressure is present, the bill will close and not allow children or animals to crawl inside when there is no head pressure.
Will the PTFE Pipe Expansion Joints rubber check valve operate if buried in sand or sediment?
This velocity will flush the rest of the sediment away from the valve opening.
18. What is the maximum temperature that the PTFE Pipe Expansion Joints rubber check valve can handle?
Temperature can range from – 65 Deg to +400 Deg depending on the specified elastomer.