Stainless steel safety relief valve
1/4 - 1/8", 1 200 psig | D500 Circle Seal Controls

D500 Series features cap design
M5100 Series off ered with ring or lift handle
MD500 Series features cup design with manual override ring
Zero leakage from 0 psi up to 70% of the marked set pressure
ASME American Society of Mechanical Engineers
Body Construction Materials Naval brass, 303 and 316 stainless steel
O-ring Materials • D500 Series: Buna N, neoprene, Tefl on®, Viton®,
EPDM, and silicone
• M5100 Series: Buna N, neoprene, Tefl on®, Viton®,
and EPDM
Set Pressure • D500 Series: 15 to 150 psig (¼˝)
• M5100 Series: 20 to 1200 psig (1⁄8˝, ¾, 1˝);
50 to 1200 psig (¼˝, 3⁄8˝, ½˝)
Temperature Range −100° F to +400° F (−73° C to +204° F)
Based on O-ring & body material, see "How to
Order"
Connection Sizes • D500 Series: ¼˝ male pipe
• M5100 Series: 1⁄8˝ to 1˝ male pipe