Valves
Monoflange Valves
Our monoflange valves put double block & bleed in a slim, integrally forged body that bolts straight onto the process flange. Replacing a heavier assembly of flanges, valves and fittings, they cut weight, height, leak points and installation cost, and give the instrument a 1/2″ NPT outlet ready to connect.
Flange
ASME B16.5, 1/2" to 2"
Class
150 to 2500
Outlet
1/2" NPT female
Versions
Block, block & bleed, DBB
Technical specifications
| Versions | Single block · single block & bleed · double block & bleed |
|---|---|
| Valve types | OS&Y or globe-type needle valves |
| Process connection | Flanged to ASME B16.5, 1/2" to 2" |
| Pressure class | ASME Class 150, 300, 600, 900/1500 and 2500 |
| Flange face | Raised face, smooth or serrated |
| Instrument outlet | 1/2" NPT female |
| Bleed port | 1/2" NPT female with hex plug |
| Packing | OS&Y: graphite (PTFE optional) Needle: PTFE (graphite or reinforced PTFE optional) |
| Body and trim | Stainless steel 316, carbon steel, duplex and nickel alloy (Alloy 400) |
| Options | Fire-safe design to API 607; NACE MR0175 / ISO 15156 materials |
| Testing | Pressure tested to API 598 |
Configurations
Single block
Single block & bleed
Double block & bleed
Related products
Two isolation valves and a bleed valve in one body, with fewer leak paths.
Isolate, equalise and vent pressure instruments from one compact block.
Isolate and vent gauges and instruments so they can be serviced safely.
Need a custom solution?
Send us your drawing or specification. Our engineers will work out the right part with you.
