Pilot Operated PCV Archives - Regport Technologies Pvt. Ltd.

Pilot Operated PCV

Pilot Operated Self Actuated Pressure Control Valve

The basic working principle for PO-SAPCV is force balance only. However, this is meant for the fine and precise pressure control when flow requirement is high. The pilot valve basically is a direct acting SAPCV only. The fluid from pilot and the main line acts on either side of the main valve actuator diaphragm resulting in the most precise reading of deviation in the controlled parameter and in turn the best performance for pressure control.

D200 Series - Downstream Pressure Control Valve

Pilot Operated Downstream Pressure Regulating Valves are meant for regulating the outlet / downstream pressure at the pre-determined set value required for the processes. With Pilot Operated Regulators precise pressure control can be achieved even at high flow capacities and higher turndown ratios.

Movement occurs as pressure variations register below the diaphragm of main regulator. The registering pressure is the outlet or downstream pressure. The loading pressure exerted by pilot opposes diaphragm movement. As outlet pressure tend to drops due to consumption at process, the loading pressure pushes the diaphragm down, opening the port and relief the pressure; as outlet pressure is compensated, the diaphragm pushes up and the port opening closes.

The pilot is a small capacity regulator that exerts controlled loading pressure on top chamber of diaphragm. Restricting needle valve in pilot line which is factory set and that controls the loading pressure response. Movement occurs as pressure variations register below the diaphragm. The registering pressure is the outlet or downstream pressure through impulse tubing. The range spring opposes diaphragm movement. As outlet pressure tend to drops due to consumption, the range spring pushes the diaphragm down, opening the port; as outlet pressure is compensated, the diaphragm pushes up and the port opening closes.

Pilot Operated D 200 Series

Pilot Operated D 210 Special Twin Pilot Design

Features

Self Actuated Design : 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.
Precise Pressure Control : The precise outlet pressure control is achieved with pilot operated design affecting efficient response capability and accuracy.
Balanced Trim Design : Due to balanced trim design, the variation in outlet pressure due to change in inlet pressure is minimal.
Easy Maintenance : The maintenance and inspection of the pressure regulating valve internals is possible without removing body from pipe line.
Material selection : 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.
Load absorbing Diaphragm assembly : Special load absorbing diaphragm assembly prevents diaphragm failure during heavy load.
Leakage Proof : Combination of metallic and soft seat enables the leakage class VI as per ANSI FCI 70.2.
Minimum Maintenance Cost : The general replacement parts are polymer parts like Diaphragm, Soft Seat & O Rings only and thus the maintenance cost is very low.
Easy Change in Set Pressure : The change in set pressure can easily be achieved by turning the pilot set screw at site. Also, a wide range can be availed with the pilot spring and in case, if needed, the spring for Pilot Valve can be changed at site for achieving desired set pressure with certain limitation.
Tamper : Cap and adjusting screw discourage on-field tampering of the pressure setting.

Material Of Construction

Body

CS A216 Gr WCB (standard), CF8, CF8M, Aluminium, CF3, CF3M, WC6, WC9, LCB, LCC, AlumBronze, Monel, Inconel or any other material on request.

Internals

AISI304 (Standard), AISI316, 316L, Monel, Hastalloy B/C and other on request.

Soft Seat & Polymer

Buna N (Nitrile), Neoprene, Fluroelastomer, PTFE and other on request.

Diaphragm

Reinforced Polymers like Buna N (Nitrile), Neoprene, Fluroelastomer and PTFE.

Wetted Spring

SS302, SS316, Inconel X750 or any other material on request..

Spring Housing

Fabricated Steel (Standard) and other on request.

U200 Series - Upstream Pressure Control Valve Ie Back Pressure Regulating Valve

The U200 series are pilot operated self actuated globe type medium pressure back pressure regulating valves meant to regulate the inlet pressure at pre-determined set value required for the processes/equipment protection.

Movement occurs as pressure variations register above the diaphragm of main regulator. The registering pressure is the inlet or upstream pressure. The inlet pressure acts on the diaphragm of the pilot. Pilot is an upstream pressure control valve which opens in the event of high upstream pressure than its set pressure. Rise in inlet pressure above the set pressure opens the pilot affecting the main valve to open and flow to take place. The pressure is apply on the diaphragm in main regulator through pilot valve, it pushes the diaphragm down of main regulator, an opens the port. As inlet pressure is compensated, the pilot valve get closed, diaphragm in main regulator moves up due to spring force and port opening closes.

Features

Back Pressure Regulation / Control: These are designed to respond to the smallest rise in pressure at inlet and allow the excess pressure at outlet affecting protection of equipments and helping the efficiency of equipments like pumps and compressors. These are also used as Pressure Holding Valves as they hold the pressure at upstream.
Self Actuated Design: This series of back pressure regulating valves are self actuated or self contained and hence, do not require any external energy like pneumatic air or electricity to operate.
Internal impulse Sensing: The impulse sensing is internal ie through the valve body itself avoiding the impulse tubing for sensing.
Accurate Pressure Control The inlet pressure directly acts on the diaphragm to counter balance the spring force affecting efficient response capability and accuracy.
Easy Maintenance : The maintenance and inspection of the back pressure regulating valve internals is possible without removing body from pipe line.
Material selection : 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.
Tamper - Resistant Adjustment: Cap and adjusting screw discourage on-field tampering of the pressure setting.
Leakage Proof : Combination of metallic and soft seat enables the leakage class VI as per ANSI FCI 70.2.
Minimum Maintenance Cost : The general replacement parts are polymer parts like Diaphragm, Soft Seat & O Rings only and thus the maintenance cost is very low.