Monoflange Valve Manufacturers in India

1/4″ to 2″ | Stainless Steel to Nickel Alloy Grades | Fire-Safe & NACE MR0175 Options | Mill Certified

Single, double block and bleed, and triple monoflange configurations
Class 150# to 2500#, 1/4″ to 2″, bar stock forged body
Stainless steel, duplex, carbon steel and nickel alloy grades in stock
Fire-safe (API 607) and NACE MR0175 sour-service options available

Aashish Metals is one of the monoflange valve manufacturers in India that instrumentation and EPC buyers turn to when a project needs to cut down on fittings without cutting corners on safety. A monoflange valve bolts directly onto a process flange and combines isolation, equalising and venting into a single compact body, replacing what would otherwise be a stack of separate valves and fittings and, with it, several extra leak points. As monoflange valve manufacturers, we build single block, double block and bleed (DBB), and triple monoflange configurations, machined from solid bar stock in stainless steel (316/316Ti/304), duplex and super duplex, carbon steel and nickel alloys including Monel, Inconel, Hastelloy and Alloy 20. Sizes run from 1/4″ up to 2″, in pressure classes from 150# through 2500#, and some of our monoflange bodies carry an integral needle valve for fine flow control alongside the block and bleed function. Every valve is hydrostatically tested per API 598, is available in a fire-safe design to API 607, and can be qualified for sour service to NACE MR0175 where the project calls for it, with a full EN 10204 3.1/3.2 mill test certificate and heat-number traceability on every order.

What Is a Monoflange Valve, and Why Use One?

A monoflange valve is built to do the job of several separate components at once. Instead of bolting a block valve, a bleed valve and assorted fittings onto a process flange one after another, a single monoflange body bolts on directly and gives you isolation, pressure equalising and venting in one machined block. Fewer joints means fewer places for a leak to start, a smaller footprint on a crowded instrument rack, and less time spent on installation.

Single Block, Double Block & Bleed, and Triple Monoflange

Single block monoflange: one isolation valve between the process and the instrument, the simplest configuration
Double block and bleed (DBB) monoflange: two isolation valves with a bleed valve between them, so the space in between can be vented and checked before an instrument is removed, without ever touching the process line itself
Triple monoflange: adds a further valve, typically used where a project specification calls for an extra layer of isolation or a combined isolation and calibration point

Flow Control Built In

Certain monoflange bodies include an integral needle valve alongside the block and bleed function, which lets you fine-tune flow to the instrument rather than just isolate it. It is worth specifying this option upfront, since it changes the internal machining of the body.

Monoflange Valve Material Specification Chart

Specification	Details
Type	Single Monoflange, Double Block & Bleed, Triple Monoflange
End Connection	Flanged, Threaded, Tube End, Socket Weld
Size Range	1/4″ to 2″ (Flange size 1/2″ NB to 2″ NB)
Pressure Class	150#, 300#, 600#, 900#, 1500#, 2500#
Temperature Range	-46°C to 472°C
Body Type	Bar Stock, Forged
Handle	T-Handle
Construction Standard	ANSI/ASME B16.5, ASME B16.34, MSS SP-99
Face-to-Face Dimension	ASME B16.10
Fire-Safe Design	API 607
Testing Standard	API 598
Sour Service	NACE MR0175
Standard Outlet / Vent	1/2″ NPT (F) outlet, 1/4″ NPT (F) vent
Packing & Seat Material	PTFE, Graphoil, PEEK
Body Materials	SS 316, SS 304, SS 316Ti, Copper, Brass, Duplex, Carbon Steel, Inconel, Super Duplex, Hastelloy, Monel, Alloy 20, SMO 254, 904L, Titanium

As with our other valve ranges, the material you pick decides the grade family it belongs to:

SS 316 / 316Ti / 304 map to our stainless steel range
Duplex and Super Duplex map to our duplex and super duplex steel range
Carbon Steel bodies come from our carbon steel range
Monel, Inconel, Hastelloy and Alloy 20 come from our Monel, Inconel, Hastelloy and Alloy 20 ranges
Titanium bodies come from our Titanium range, and Copper Nickel from our Copper Nickel range

Quality, Testing & Certification

100% hydrostatic testing per API 598 on every valve before dispatch
Third-party inspection available: BV, SGS, TÜV, Lloyd’s
EN 10204 3.1 / 3.2 mill test certificate with heat-number traceability
100% radiography testing on request
Fire-safe design and testing to API 607 for critical service
Sour service qualification to NACE MR0175 for H2S-bearing lines
Raw material test certificate and positive material identification (PMI)

Double Block & Bleed Valve Monoflange

MonoFlange Block & Bleed Valve

MonoFlange Process Valve

MonoFlange Single Isolation Valve

Instrumentation Double Block & Bleed Monoflange

Monoflange DBB Valves

Key Block DBB Valves

Customized Monoflange Valve

Single Block & Bleed Valve Dimensions (mm)

Size (Inch)	Class	A (mm)	ØB (mm)	ØC (mm)
1/2	150	57	90	2
1	150	57	110	2
2	150	63	150	2
1/2	600	61	95	7
1	600	64	125	7
2	600	67	165	7
1/2	1500	60	120	7
1	1500	60	150	7
2	1500	72	215	7
1/2	2500	60	135	7
1	2500	60	160	7
2	2500	72	235	7

Full dimension tables across every size and every class from 150# to 2500#, plus the double block and bleed variant, are available in our downloadable spec sheet.

Monoflange Valve Price

Monoflange valve prices depend on the configuration, size, pressure class and material, so a fixed price list won’t give you an accurate number. A 1/2″ single block valve in stainless steel and a 2″ double block and bleed valve in duplex steel sit in very different price ranges.

To get an accurate quote, share:

Configuration (single block, double block and bleed, or triple monoflange)
Size and flange rating (e.g., 1/2″ NB, Class 1500)
Material (SS 316, duplex, Monel, Inconel, etc.)
End connection (flanged, threaded, tube end, socket weld)
Any special requirements (fire-safe design, NACE MR0175, integral needle valve)

Send these details and we’ll come back with current pricing and stock availability from our Mumbai stockyard, usually within 24 hours, along with the mill test certificate terms included.

Monoflange Valves We Supply (By Material)

The body pattern stays the same across single, double block and bleed, and triple configurations; only the material changes to suit the service. We regularly supply:

Stainless Steel 304 / 316 / 316Ti / 904L monoflange valves
Duplex and Super Duplex Steel monoflange valves
Carbon Steel monoflange valves
Monel monoflange valves
Inconel monoflange valves
Hastelloy monoflange valves
Alloy 20 monoflange valves
Titanium monoflange valves
Copper Nickel monoflange valves

Also available in every standard class and configuration (reference keywords, not separate pages, since they’re all covered on this page):

Single block, double block and bleed, and triple monoflange valves
Class 150#, 300#, 600#, 900#, 1500# and 2500# monoflange valves
Flanged, threaded, tube end and socket weld connection monoflange valves

Looking for the rest of your instrument hook-up? See our instrumentation fittings and check valves ranges, or browse the full special instrumentation fittings catalogue.

We supply of variety MonoFlange Valves

Aashish Metal & Alloys is a Highly Acclaimed Manufacturer & suppliers of MonoFlange Valves offering more than 3000 varieties in all types of MonoFlange Valves in all sizes, with more then 52 countries worldwide.

Monoflange Valves Premiere Quality	Monoflange Valves Stockist In Mumbai
SS 316 Monoflange Valves	Alloy Steel Monoflange Valves
Monoflange Valves Exporter	Diagram Block & Bleed Monoflange Valves
Stainless Steel 304 Monoflange Valves	Alloy 20 Monoflange Valves
Titanium Monoflange Valves	Monoflange Valves at Best Price in India
Mono Flange Butterfly Valve	SMO 254 Monoflange Valves
Monoflange DBB Valve	Super Duplex Steel Monoflange Valves
Monoflange Needle Valves	Industrial Monoflange Valves Supplier
Copper Nickel Monoflange Valves	CS Monoflange Valves
Monoflange Double Block And Bleed Valve	Instrument Monoflange Valves
SS 304L Monoflange Valves Manufacturer	Stainless Steel Monoflange Valve
Monel Monoflange Valves	Monoflange Valves Distributor
Monoflange Valves Stockist	SS 316L Monoflange Valves
Monoflange Single Block & Bleed Valve	Monoflange Single Isolation Valve
Incoloy Monoflange Valves	Bleed Monoflange Valves
Monoflange Gate Valve Dealer	Single Block Monoflange Valves
Monoflange Ball Valve	Parker Monoflange Valve
Hastelloy Monoflange Valves	Key Block DBB Valves
Slimline Monoflange Valves	Nickel Alloy Monoflange Valves

Application Of MonoFlange Valves

Instrumentation: mounting pressure gauges, transmitters and other field instruments, with a compact single-body design that eliminates several separate fittings and their leak points
Process isolation: isolating an instrument from the process line for maintenance or calibration, with block and bleed venting any trapped pressure before the instrument comes off
Pressure relief: some monoflange designs build in a pressure relief valve, protecting the instrument from overpressure
Flow control: an integral needle valve in the monoflange body allows fine flow adjustment to the instrument
Corrosion resistance: built from stainless steel or exotic alloys where the process fluid is aggressive

We Serve

Application Industry

Automotive and aerospace industry, Chemical industry, Heat exchanger, Food processing equipment, Architectural trim and molding, Kitchen benches, sinks, equipmentrtc

For More Information About MonoFlange Valves please call +91-22-66362223 / 66394926 or send an email to export@aashishmetal.com

FAQ’s About Forged Globe Valve

What is a monoflange valve?

A monoflange valve is a compact, flange-mounted valve that combines isolation, pressure equalising and venting functions into a single machined body, bolting directly onto a process flange in place of several separate valves and fittings.

How does a monoflange valve work?

The valve bolts onto the process flange and provides a direct path for the instrument connection. In a double block and bleed configuration, two internal isolation valves seal off the process, while a bleed valve between them lets you vent any trapped pressure before removing the instrument, all without breaking containment on the process line.

What are the main applications of a monoflange valve?

Monoflange valves are mainly used to mount and isolate pressure gauges and transmitters, to isolate instruments for maintenance or calibration, and, in some designs, to provide pressure relief or fine flow control through an integral needle valve.

What materials are monoflange valves made from?

Common body materials include stainless steel (304, 316, 316Ti, 904L), duplex and super duplex steel, carbon steel, and nickel alloys such as Monel, Inconel, Hastelloy and Alloy 20, selected based on the process fluid and operating temperature.

How do I choose the right monoflange valve for my application?

Start with the process flange size and rating, the operating pressure and temperature, and the process fluid’s corrosivity. From there, decide whether single block, double block and bleed, or triple monoflange configuration fits your isolation and venting requirements, and whether you need an integral needle valve for flow control.

Monoflange Valve