DIRECT ACTING PRESSURE CONTROL VALVE
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The basic working principle for this DA-SAPCV is force balanced principle achieved by spring diaphragm mechanism. The fluid pressure acts on the wider area of diaphragm and the balancing force is provided by the spring. Thus fluid force itself is an operating media and the best control is achieved even for the smallest deviation in controlled parameter as its (fluid force) acting on the wider area of diaphragm.
D100 Series :- Downstream Pressure Control Valve
Direct Acting Downstream Pressure Regulating Valves – also, called as Pressure Reducing Valves – are meant for reducing the source pressure and regulating the outlet / downstream pressure at the pre-determined set value required for the processes. With direct acting Regulators precise pressure control can be achieved at specified process requirements.
As outlet / downstream pressure tend to drop due to consumption at process, the spring force pushes the diaphragm down, due to which stem & soft seating disc also moves down and opens the port. As soon as outlet / downstream pressure is compensated, the diaphragm pushes up, the stem & soft seating disc also moves up and the port opening closes.
As outlet / downstream pressure tend to drop due to consumption at process, the spring force pushes the diaphragm down, due to which stem & soft seating disc also moves down and opens the port. As soon as outlet / downstream pressure is compensated, the diaphragm pushes up, the stem & soft seating disc also moves up and the port opening closes.
FEATURES
This series of pressure regulating valves are self actuated or self contained and hence, do not require any external energy like pneumatic air or electricity to operate.
The precise outlet pressure control is achieved with this design affecting efficient response capability and accuracy.
Due to balanced trim design, the variation in outlet pressure due to change in inlet pressure is minimal.
The maintenance and inspection of the pressure regulating valve internals is possible without removing body from pipe line.
As a standard we provide trim material as AISI 316. Wide range of material is available to suit various services for different process fluids including corrosive fluids. NACE compliance can be provided for sour services
Cap and adjusting screw discourage on-field tampering of the pressure setting.
Special load absorbing diaphragm assembly prevents diaphragm failure during heavy load
Combination of metallic and soft seat enables the leakage class VI as per ANSI FCI 70.2.
The general replacement parts are polymer parts like Diaphragm, Soft Seat & O Rings only and thus the maintenance cost is very low.
The change in set pressure can easily be achieved by turning the set screw at site. Also, a wide range can be availed with the certain spring and in case, if needed, the spring can be changed at site for achieving desired set pressure with certain limitation.
MATERIAL OF CONSTRUCTION
CS A216 Gr WCB (standard), CF8, CF8M, Aluminium, CF3, CF3M, WC6, WC9, LCB, LCC, AlumBronze, Monel, Inconel or any other material on request.
St St316 (standard), St St304, 316L, Monel, Inconel, Hastelloy B/C or any other material on request
BunaN (Nitrile), Neoprene, Fluroelastomer (Viton), PTFE or any other material suitable for process / on request
Reinforced Polymers like Buna N (Nitrile), Neoprene, Fluroelastomer (Viton), and PTFE with polymer backup
SS302, SS316, Inconel X750 or any other material on request.
Carbon Steel IS4454 Gr.II / III, H12, EN47, SS302, SS316, Inconel X750 or any other material on request.
Fabricated Steel (Standard) and other on request
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