Relief Valve Overview

Series Body Materials O-Rings Operating Pressure Temperature Range Connections
500 Aluminum
Brass
303 stainless
316 stainless
Buna N
ethylene propylene
silicone
neoprene
Telfon®
Viton®
Vacuum to 200 psig −320°F to +400°F
−196°C to +204°C
1/8″ to 1-1/4″
L500 Brass
316 stainless
Buna N
ethylene propylene
silicone
neoprene
Telfon®
Viton®
0 to 25 psig
(1.71 Bar)
−70°F to +550°F
−57°C to +288°C
1/4″ to 1/2″
HP500 Brass
316 stainless
Buna N
ethylene propylene
silicone
neoprene
Viton®
150 to 575 psig
10 to 40 bar
Depending on
pipe size
−65°F to +350°F
−54°C to +177°C
1/4″ to 1/2″ male and female pipe
5100 Brass
Carbon Steel
303 stainless
316 stainless
Buna N
ethylene propylene
neoprene
Telfon®
Viton®
0 to 2400 psig
166 bar
−320°F to +400°F
−196°C to +204°C
1/8″ to 1-1/4″
D500/M5100 Naval brass
303 stainless
316 stainless
Buna N
ethylene propylene
neoprene
Telfon®
Viton®
EPDM
M5100 only: silicone
  −100°F to +400°F
−73°C to +204°C
D500: 1/4" male pipe
M5100: 1/8″ to 1″ male pipe
5300 Brass
303 stainless
316 stainless
Buna N
neoprene
Viton®
400 to 10,500 psig
(28 to 724 bar)
−65°F to +350°F
−54°C to +177°C
1/4″ to 1/2″ female pipe
1/4″ to 1″ female tube
R6000 316 stainless Buna N
EPR
neoprene
Kalrez®
Viton®
silicone
5-6000 psig
0-414 barg
−70°F to +550°F
−57°C to +288°C
1/4″


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