Monoflange valves can directly be mounted to a flanged process connection.Flange dimensions of ½" till 3" are available in combination with different pressure ratings (e.g. 150# till 2500#) and flange finishes (e.g. RF, FF and RTJ).
Monoflange valves'Flanges can be made as per international standards like ASME, API and EN1092-1.
The close coupled way of mounting pressure instruments combines a pressure or dP/flow/level manifold with a fire safe process valve. It is the perfect combination of a DBB root valve, fittings, process tubing, manifold with bracket into one(1) unit.This gives huge savings (up to 40%) in material, installation costs, weight and space.It reduces possible leakage points to a minimum.
monoflange single block ball valve Monoflange valves are used on Upstream Offshore/Onshore Gas and Oil production and initial processing installations. Typically used on gas gauge pressure instrument applications to minimize the size and weight of the pipe-valve assemblies used for primary and/or secondary isolation, vent.
Monoflange Block & Bleed Valve advantages will be achieved in significant weight and component cost savings when compared to other conventional installation solutions.
Monoflanges can be configured as either single block and bleed, or double block and bleed; with a plugged vent port for the bleed. The double block and bleed is also available with the Stewarts OS&Y needle valve in the primary isolation position.
The monoflange valves series are available as Process Monoflanges (PM range) and Instrument Monoflanges (IM range).
Monoflange Valves are integrally forged, one-piece double Mock and bleed assemblies for primary isolation of pressure take-offs, where the valve is directly mounted to the vessel or process pipe. Instruments may be directly mounted to the valve outlet or alternatively remotely with gauge lines/impulse pipe work
Monoflange DBB Valve
Screwed bonnet design.
Bonnet- back seated blow out proof.
Spindle - ground and thread rolled.
Packing below thread.
Instrument monoflange valves are defined as flanges with integral shut-off valves in a variety of configurations. For shut-off purpose only a single valve assembly is available. The most common assembly however is shut-off valve combined with additional drain / vent valve, or two consecutive shut-off valves in combination with a drain / vent valve in a double block and bleed design. Whereas the Monoflange process side connects directly to the process flange, the instrument connection is either 1/2” NPT female threaded or features a swivel adapter with G1/2“ thread allowing for 360° free orientation of the instrument. Process flanges come in a number of different pressure ranges and sizes; therefore Monoflanges are usually tailor made to meet your specific requirements.
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