Mono Flange Valves Information

♦ Monoflange valves are used as an alternative to a system which has multiple valves. They are designed specially to provide a compact installation for transmitter and gauge instruments.

♦ The monoflange can be used for measuring gases, liquids as well as vapors.

♦ It can be used for corrosive pressure media as well as in aggressive environments

♦ It can be used for industrial process plant within general plant construction, machine building, chemical or petrochemical, mining, power station, on and offshore as well as environmental technology.

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Technical Specifications:

♦ Monoflange valve size are Available: 1/2” up to 3”

♦ Ratings: ANSI 150-2500 lbs


♦Single block and bleed & Double block and bleed design

♦ Metal to Metal seated design   

♦ Fire safe design

Bonnet Assembly:

♦ Bonnet: back seated blow out proof.

♦ Spindle: ground and thread rolled. Packing below thread.

♦ Spindle Tip: non-rotating tip shut-off type & soft seated.

♦ Dust cap: dust cap protects stem threads from external contamination heat code traceability.


General Specifications:

♦ Monoflange Valve design as per ASME B16.34. Individual 100% pressure testing ensures safety. If the Monoflange valves are to be used for gas, oxygen or any other special application, please give full details when ordering with temperature and pressure. Other metallic finish on request. Are also manufactured in stainless steel, Brass and other material upon request.

♦ Including NACE MR-01-75 (latest revision).


Specifications/standards given in the following table are followed for threaded & Flanged end.


End Connection

Reference Specifications


ASME B1.20.1, SAE AS71051

 ISO/BSP Parallel

ISO 228

ISO/BSP Tapered

ISO 7, BS EN 10226-1

SAE (Unified)


Flanged End

ASME – B16.5, DIN and JIC flanges available.


♦ Pneumatic seat test is performed at 1/4 of working pressure. Hydrostatic shell test is performed at 1.5 times the working pressure optional test are available upon request. 


Material of Construction:

♦  Monoflange Valve are available in MOC 316 stainless steel as a standard. Monoflange Valve can also be manufactured in Brass, SS 316L, Monel and other exotic alloys upon request. Raw material outsourced meets requirements of one or more following ASTM specifications.



Bar Stock



Stainless Steel

ASTM A 276 / A479 SS316

ASTM A 182 SS316

DIN 4401

DIN 4401






ASTM B16 Alloy 360

ASTM B 124 Alloy 377





ASTM B 453 Alloy 345

BS 2872 CZ 122

Alloy 400 (Monel)

ASTM B 164 / ASME SB 164

ASTM B 564 / ASME SB 564

Alloy 825 (Inconel)

ASTM B 425

ASTM B 564 / ASME SB 564

Alloy C-276 (Hastelloy)

ASTM B 574

ASTM B 564

SAF 2507 (Super Duplex)

ASTM A 479

ASTM A 182