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
▶D SERIES - DIAPHRAGM OPERATORS HYDRAULIC CONTROL VALVES
▶D-MV SERIES - MANUEL HYDRAULIC CONTROL VALVE
▶D-ELV SERIES - SELONOID CONTROL VALVE
▶D-PRV SERIES - PRESSURE REDUCING CONTROL VALVE
▶D-QRV SERIES - PRESSURE RELIEF HYDRAULIC CONTROL VALVE
▶D-PKV SEERIES - PUMP CONTROL VALVE
▶D-PREL SERIES - PRESSURE REDUCING SELENOID CONTROL VALVE
▶D-FLV SERIES - FLOAT CONTROL VALVE
▶D-PSV SERIES - PRESSURE SUSTAINING CONTROL VALVE
▶D-PRSV SERIES - PRESSURE REDUCING AND SUSTAINING CONTROL VALVE
▼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)
G-QRV SERIES - PRESSURE RELIEF HYDRAULIC CONTROL VALVE
PRODUCT DESCRIPTION
The pressure relief control valves are used for relieving the system with opening up and evacuating the excessive pressure when the pressure in the system is over a specific limit value. When the system pressure reduces to the valve’s adjusted limit value, it closes again. The relief valve’s pressure value is adjusted from the pilot valve placed on the main valve. The pilot valve’s adjusted value is not affected from the valve’s exit’s back pressure.
1. Main Valve
2. Pilot Valve
3. Adjust Screw
4. Ball Valve
5. Strainer
6. Needle Valve
7. Pressure Gauge
PROPERTIES
The valve protects the pipe system and the other armatures through rapidly evacuating the excessive pressure in the network to the atmosphere.
The relief control valves hold the system pressure steady without affecting from the flowrate changes.
The relief pilot valve’s control mechanism rapidly opens to hold the system pressure steady when the system flowrate reduces. When the system pressure reduces to the valve’s adjusted value, it closes up with not causing any blow.
After the valve opens rapidly and finishes the evacuation process, it closes up slowly and fully impermeable without causing any pressure fluctuation in the network again.
The valve works with the line pressure entirely hydraulic not needing any extra energy source.
Because of the valve’s design is globe type, its maintenance is quite easy and cheap.
The valve works safely even vertical and horizontal mountings.
The relief control valves are mounted TEE type to the network. The valve’s diameter calculation is done with the
formula.
D : Relief valve diameter (mm)
Q : System Flowrate (m³/h)
P : System Pressure (meters)
OPERATING MANUAL
Mount the valve according to the arrow placed on the valve that shows the flow direction.
Mount the rapid pressure relief control valve at a “TE” configuration to the system that the valve exit opens to the atmosphere.
The valve diameter must not be selected as same with the network line diameter, if the rapid pressure relief control valve is wanted to be work fully effective. The rapid pressure relief control valve’s diameter must be selected as 1/3 of the network diameter.
Mounting isolation valves (gate, butterfly or ball etc.) at the entrance direction for shutting-off the water in the line are recommended to ease the maintenance of the valve.
Evacuate the water in the valve’s actuator to the atmosphere to prevent freezing in winter.
Adjustment of the rapid pressure relief hydraulic control valve is done with the adjust screw of the pilot valve placed on the main valve. The pressure value increases when you turn the adjust screw clockwise. If you turn it counter clockwise, the pressure value reduces.
If the valve doesn’t close itself at the adjusted pressure value, loose the needle valve placed on the pilot valve ½ or 1 tour.
1. Pump
2. Isolation Valve
3. Strainer
4. Check Valve
5. Relief Control Valve
6. Air Valve
7. Pressure Gauge
8. Reservoir