Pneu Hydro is is now part of the Proserv Group , a leading provider of production technology services to the global energy sector. You will experience no change to the service you see as part of this transition.

For further information about Proserv and its portfolio of services, please visit www.proserv.com or email info@proserv.com

Miniature Relief Valves

Pneu-Hydro miniature relief valves provide zero leakage up to cracking pressure. They reseal bubble-tight within 5% to 10% of cracking pressure. Adjustments are insensitive to temperature variations.

These miniature relief valves are made from 316 stainless steel for strength and corrosion resistance. Material options can be provided on request. Buna-N or Viton O-rings are standard but other O-ring materials can be provided. Back-pressure on the 405 and 407 series (with connected vent line) should be limited to 1,000 psid.

Specifications

Operating pressure ranges

 

404 and 405 series

50 to 5,000 psid

406 and 407 series

5,000 to 13,000 psid

Cv

.035

Operating temperature ranges

 

Buna-N seals

-40° to 250°F (-40° to 121°C)

Viton seals

-20° to 450°F (-29° to 232°C)

Ordering Information

Pressure Range

Vent to Atmosphere

1/4 NPT Vent Connection

Buna-N

Viton

Buna-N

Viton

50 – 100 psid

404M4Q-10

404M4Q-10V

405M4Q-10

405M4Q-10V

100 – 150 psid

404M4Q-1

404M4Q-1V

405M4Q-1

405M4Q-1V

150 – 250 psid

404M4Q-2

404M4Q-2V

405M4Q-2

405M4Q-2V

250 – 350 psid

404M4Q-3

404M4Q-3V

405M4Q-3

405M4Q-3V

350 – 600 psid

404M4Q-4

404M4Q-4V

405M4Q-4

405M4Q-4V

600 – 900 psid

404M4Q-5

404M4Q-5V

405M4Q-5

405M4Q-5V

900 – 1,500 psid

404M4Q-6

404M4Q-6V

405M4Q-6

405M4Q-6V

1,500 – 3,000 psid

404M4Q-7

404M4Q-7V

405M4Q-7

405M4Q-7V

3,000 – 5,000 psid

404M4Q-8

404M4Q-8V

405M4Q-8

405M4Q-8V

5,000 – 13,000 psid

406M4Q

406M4Q-V

407M4Q

407M4Q-V

Notes:
Material and connection options are also available. Consult factory.
Optional materials include brass and aluminum.
Optional connections include MS-33656-4.

 

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