Techno 5050-8 EPDM Check Valve

Cast iron body (ASTM A351 Grade CF8M), 316 stainless steel internals (ASTM A351 Grade CF8M), 316 stainless steel spring (ASTM A313), EPDM seal

The 8″ Wafer Check Valve has the following specifications:

• • A: 3″, B: 8 3/4″, C: 1 7/8″, D: 6 1/8″, E: 5 3/4″ – See diagram
  • ASME Class 125
  • EPDM Temperature Range: -40° F to 300° F
  • Maximum working pressure: 165 psi at 300° F

• Assembled, inspected, and tested in the USA

 

 

ASME Pressure – Temperature Rating
Maximum Non-Shock Pressure – psi

Temp ° F	ASME 125 2″ – 12″ Valve	ASME 125 14″ – 24″ Valve
150° F	200 psi	150 psi
200° F	190 psi	135 psi
225° F	180 psi	130 psi
250° F	175 psi	125 psi
275° F	170 psi	120 psi
300° F	165 psi	110 psi
325° F	155 psi	105 psi
350° F	150 psi	100 psi
400° F	140 psi	–
450° F	125 psi	–
Hydrostatic Test – psi	350 psi	265 psi

 

TECHNO Dual-plate, Metal-hinged Wafer-style Check Valves

• Compact wafer-style, one-piece design
• Center post fully supports the internal assembly without external pins or plugs
• No fugitive emissions to atmosphere is ensured due to its standard design, which eliminates through holes and pipe plugs in the body
• Maximum flow area reduces pressure loss
• Reduces installation space and time

VALVE PLATES
The dual-plate design produces increased strength with reduced opening and closing time.

CLAMP PLATES
Clamp plates offer additional strength to valve plates and allow seals to be changed easily.

SEALS
Specially designed flat, full-contact seals maintain positive shutoff at low working pressures. Unlike most other valves, these seals are replaced easily in the field.

SPRINGS
Torsion springs assist valve plate closure, preventing flow reversal. Consistent valve response ensures against slamming and water hammer.

SHAFT
The shaft features heavy-duty, corrosion-resistant construction.

SHAFT SUPPORTS
Shaft supports act as stops to prevent over-travel of valve plates. They are corrosion resistant with large shaft-bearing surfaces and are easily removable for internal assembly, maintenance or change.

THRUST WASHERS
Thrust washers reduce friction and wear of valve plate hinges.

Variety of Configurations
Techno offers a wide variety of wafer bodies in different styles and materials. These can be assembled with different disc, spring, and elastomer seal choices to make a valve that exactly fits your application. Contact pdblowers if you would like a quote on any of these options.

BODY	INTERNALS	SPRING	SEAT	CLASS
Aluminum Cast Iron Carbon Steel Cast Steel 316 Stainless Steel	Aluminum Bronze Aluminum Bronze Carbon Steel Cast Steel 316 Stainless Steel	302 SS 316 SS INCONEL X-750 No Spring	Buna N EPDM Silicone Viton A	ASME 125 ASME 150 ASME 300 ASME 600 50 psi-cwp 100 psi-cwp 125 psi-cwp

 

Techno 5050 vs US Valve 31 Series
pdblowers supplies both the 5050 Series from Techno and the 31 Series from US Valves. These valves are equivalent in performance, materials, and dimensions.

The main functional difference between the two is the retainerless design of the Techno 5050 series. These valves feature a center post that fully supports the internal assembly without any external pins or plugs, so there are no holes and plugs in the body which could potentially allow fugitive emissions to atmosphere. If you have a gas application you may want to consider a 5050 valve from Techno or contact us about a retainerless option from US Valve.

The other difference is the lower cost and wider availability of the standard US Valve 31 series. At pdblowers we keep some models of the 31 series in stock and, when they need to be ordered from the factory, lead times are typically only a few days. Average lead times for Techno 5050 Valves are 1-2 weeks.