Products

HYDRAULIC VALVES

WATER WORKS

G SERIES - GLOB TYPE HYDRAULIC CONTROL VALVE G-PRV SERIES - PRESSURE REDUCING CONTROL VALVE G-QRV SERIES - PRESSURE RELIEF HYDRAULIC CONTROL VALVE G-FLV SERIES - FLOAT LEVEL CONTROL VALVE G-EL / 2W SERIES - SOLENOID CONTROL VALVE G-EL / 3W SERIES - SOLENOID CONTROL VALVE G-EFL SERIES - ELECTRICAL FLOAT CONTROL VALVE G-PSV SERIES - PRESSURE SUSTAINING CONTROL VALVE G-PRSV SERIES - PRESSURE REDUCING AND SUSTAINING CONTROL VALVE G-PREL SERIES - PRESSURE REDUCING SOLENOID CONTROL VALVE G-ECV SERIES - ELECTRONIC CONTROL VALVE G-DKV SERIES - FLOW CONTROL VALVES G-PKV SERIES - PUMP CONTROL VALVE G-REV SERIES - SURGE ANTICIPATING CONTROL VALVE G-CV SERIES - HYDRAULIC CHECKVALVE G-LCV SERIES - LIFT TYPE CHECKVALVE DQR / DIRECT ACTING RELIEF CONTROL VALVE DLG-EL / ELECTRIC ACTIVATION DELUGE ALARM VALVE DLG-P / PNEUMATIC ACTUATION DELUGE (DRY) ALARM VALVE DLG-ELP / ELECTRO-PNEUMATIC ACTIVATION DELUGE ALARM VALVE (PRE-ACTION)

IRRIGATION

FIRE FIGHTING

G SERIES - GLOB TYPE HYDRAULIC CONTROL VALVE G-PRV SERIES - PRESSURE REDUCING CONTROL VALVE G-QRV SERIES - PRESSURE RELIEF HYDRAULIC CONTROL VALVE G-FLV SERIES - FLOAT LEVEL CONTROL VALVE G-EL / 2W SERIES - SOLENOID CONTROL VALVE G-EL / 3W SERIES - SOLENOID CONTROL VALVE G-EFL SERIES - ELECTRICAL FLOAT CONTROL VALVE G-PSV SERIES - PRESSURE SUSTAINING CONTROL VALVE G-PRSV SERIES - PRESSURE REDUCING AND SUSTAINING CONTROL VALVE G-PREL SERIES - PRESSURE REDUCING SOLENOID CONTROL VALVE G-ECV SERIES - ELECTRONIC CONTROL VALVE G-DKV SERIES - FLOW CONTROL VALVES G-PKV SERIES - PUMP CONTROL VALVE G-REV SERIES - SURGE ANTICIPATING CONTROL VALVE G-CV SERIES - HYDRAULIC CHECKVALVE G-LCV SERIES - LIFT TYPE CHECKVALVE DQR / DIRECT ACTING RELIEF CONTROL VALVE DLG-EL / ELECTRIC ACTIVATION DELUGE ALARM VALVE DLG-P / PNEUMATIC ACTUATION DELUGE (DRY) ALARM VALVE DLG-ELP / ELECTRO-PNEUMATIC ACTIVATION DELUGE ALARM VALVE (PRE-ACTION)

MECHANICAL VALVES

KNIFE GATE VALVE SURFACE BOXES CHECK VALVE (CLASS 150) CHECK VALVE (DISC TYPE) CHECK VALVE (SPRING TYPE) CHECK VALVE (GLOBE TYPE) CHECK VALVE (BALL) CHECK VALVE (WAFER TYPE) CHECK VALVE (CLASS 125) CHECH VALVE (SWING TYPE) CHECK VALVE (VERTICAL TYPE) DISMANTLING JOINT FOOT VALVES SAFETY VALVES GLOBE VALVES GLOBE VALVE (CLASS 150) GLOBE VALVE (CLASS 125) BUTTERFLY VALVE (LUG TYPE) BUTTERFLY VALVES (DOUBLE FLANGE) BUTTERFLY VALVE (WAFER TYPE) STRAINER BASKET BALL VALVES (CLASS 150-300) BALL VALVE (PN10) BALL VALVE (PN16) BALL VALVE (THREADED) STRAINER (Y TYPE) IRRIGATION HYDRANT (DOUBLE OUTPUT) IRRIGATION HYDRANT (SINGLE OUTPUT) GATE VALVE RISING STEM (CLASS 150) GATE VALVE RISING STEM (CLASS 125) GATE VALVES (PN10) GATE VALVE RISING STEM (PN16) GATE VALVE RESILIENT SEATED (PN10) GATE VALVE RESILIENT SEATED (PN16) GATE VALVE (PN 16) GATE VALVE (WITH INDICATOR) GATE VALGE RISING STEM (PN10) FLOAT VALVE (ANGLE TYPE) FLOAT VALVE (FLAT TYPE) TILTING CHECK VALVE AIR VALVES FIRE HYDRANT (SHORT TYPE) FIRE HYDRANT (OVER GROUND)

D-PSV SERIES - PRESSURE SUSTAINING CONTROL VALVE

D-PSV SERIES - PRESSURE SUSTAINING CONTROL VALVE

PRODUCT DESCRIPTION

Pressure sustaining control valves are hydraulic control valves which are used to keep the valve inlet pressure constant in distribution lines, pumping houses and filtration systems.

PROPERTIES

- Pressure sustaining hydraulic control valves could easily be used in horizontal or vertical positions in the application systems. 2- Continuously measures the pressure at the inlet of the valve and keeps it constant.
- When used at the pump outlets in the horizontal or deep-well pumping facilities, it enables the pump to start smoothly and economizes electrical energy consumption.
- Keeps the pressure fixed required in case filters are being washed in automatic self-cleaning filtration systems and helps the filters with cleaning.
- Operates hydraulically only with line pressure without requiring any extra power supply.
Since design of the valve is with diaphragm actuator, its maintenance is easy and cheap, as well.

WORKING PRINCIPLE







VALVE OPEN
In case of a sudden pressure increase in the line, spring force in the 2 way relief pilot valve is overcome and discharge port of pilot valve opens. Pressurized water in the actuator of the main valve is discharged through the discharge port to atmosphere and thus, excessive pressure is discharged to atmosphere through opening of main valve body.







VALVE CLOSED
Once the pressure in the line reduces to its normal value, spring force in the pilot valve pushes the piston which is connected to diaphragm of pilot valve and closes the discharge port. Line pressure at the normal level enables the actuator of the main valve to be filled up with the pressurized water from the the inside of the pilot valve. Hence, pressurized water in the actuator pushes the diaphragm with the help of valve’s spring force and switches the valve to closed position with a full-sealing.

SAMPLE MOUNTING AND APPLICATION SCHEME





1) Full Automatic Filter
2) Isolation Valve
3) Pressure Sustaining Control
4) Pressure Gauge

APPLICATION SCHEME

For the sake of simplicity in case of service maintenance, it is recommended to mount isolation valves (gate, butterfly or ball etc. valves) to close the water in the inlet direction of the line.
For enabling the valve to operate efficiently, it is recommended a vacum lifter to be placed before the valve.
To avoid frosting in the winter, discharge the water in the valve actuator into atmosphere.
The adjustment of pressure sustaining hydraulic control valve is made via the adjustment bolt of the pilot valve on the valve. Turning the pilot adjustment bolt clockwise will increase the pressure value, whereas it will decrease in case it is turned counterclockwise.
If the valve does not close itself at the adjusted pressure value, untighten the needle valve on the pilot valve with a 1⁄2 or 1 turn.





1. Mını Ball Valve
2.Stanier
3. Manometre
4. Pressure Sustaining Pilot Valve