4500 SZ Series Check Valves (Non-Return)

4500 Series
Check Valves (Non-Return)
Low Temperature -50ºC/ -58ºF Available Click Here

General Description

Non Return Valves
316 Stainless Steel non return valves for pressures up to 12 bar (174 psi)

316 Stainless Steel non return valves for pressures up to to 25 bar (362 psi)

Operating Fluids

Gases
Filtered lubricated or non-lubricated air, inert gas, sweet (natural) gases.
Sour gas option available (details on application)

Liquids
Low pressure hydraulic, mineral oil or water.

Technical Data

Exhaust Port Flow Regulator • 1/4" 646 (23.0) - 0.65 (10.0) • 3/8" 1100 (39.0) - 1.10 (17.0) • 1/2" 1800 (64.0) - 1.80 (28.0)	Maximum flow L/min (SCFM) - Cv(Kv) at 6 bar (87 psi), 1 bar (14.5 psi) differential
Working temperature • -50ºC to +90ºC (-58ºF to +194ºF)	Needle Valve (3mm orifice) • 1/4" 290 (10.5) - 0.30 (4.6)
Working pressure (gases & liquids) • 12 bar (174 psi) • 24 bar (362 psi)	Non Return Valves (12 bar) • 1/4" 1600 (57) - 1.6 (25.0) • 3/8" 2200 (80) - 2.3 (35.0) • 1/2" 3800 (137) - 3.9 (60.0) • 3/4" 5800 (205) - 5.8 (90.0) • 1" 7700 (274) - 7.8 (120.0)
Minimum opening pressure • 0.2 bar (2.90 psi)	Non Return Valves (25 bar) • 1/4" 736 (26) - 0.74 (11.4) • 3/8" 1840 (45) - 1.85 (28.5) • 1/2" 2600 (91) - 2.60 (40.0)

Construction Materials

Body • Stainless steel AISI 316L to NACE MR-0175 • Brass CZ 121M	Internal parts • Stainless steel AISI 316L to NACE MR-0175
Springs • 316 Stainless steel	Seals • EPDM

Additional Resources

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