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Pressure Reducing Control Valve

Fire Systems

Pressure Reducing Control Valves are hydraulic control valves that reduce the input pressure value to the desired pressure value by means of a pressure reducer pilot mounted on it. The pressure reducer control valve constantly controls the output pressure value to be set without being influenced by the flow rate and inlet pressure values. When there is no flow in the system, the valve closes itself. When the valve inlet pressure value in the system falls below the set outlet pressure value, the valve opens itself. The valve can be used in horizontal or vertical position on the system.

Available diameters according to their connections

  • FLANGED: DN50, … , DN300
  • AÇILI: 2″, DN50, DN80, DN100, DN150
  • DİŞLİ: 3/4″, 1″, 1¼”, 1½”, 2″, 2½”, 3″
  • VICTAULIC: 2″, 3″, 4″, 6″
Operating Pressure
Standart 0,7 – 16 bar (10 – 240 psi)
Low Pressure Range 0,5 – 10 bar (7,5 – 160 psi)
High Pressure Range 0,7 – 25 bar (10 – 360 psi)
Temperature
Min. Operating Temperature -10 °C (14 °F) DIN 2401/2
Max. Operating Temperature 80 °C (176 °F) DIN 2401/2
Port
Flanged DIN 2501, ISO 7005 – 2
Threaded ISO (BSP) , ANSI (NPT)
Coating
Standard Epoxy
Optional Polyester
Hydraulic Links
Standard Reinforced Nylon (Air Brake))
Hydraulic pipe SAE J 844
Optional Copper DIN 1057
Actuator Type
Single-Control Housing | Aperture Actuator, Aperture Off

Automatic control valves are used to perform the required operations as hydraulic with line pressure without the need for energy sources in the network line.

Valve Closing Mode

When the water pressure reaches the diaphragm, the water creates hydraulic force. This hydraulic force diaphragm, combined with the force applied by the spring creates a complete seal and allows it to close.


Valve Opening Mode

When the pilot on the main control valve in the closed position is placed in the evacuation position, pressurized water on the diaphragm of the main control valve is discharged. When the line pressure reaches the position to overcome the spring force, it applies hydraulic force from the bottom to the diaphragm of the control valve and allows the valve to reach the full open position


Modulation Mode

They are pilots connected to the control valve which enables the main valve to operate in this position. According to the amount of flow and pressure required to be adjusted, it controls the water pressure on the diaphragm continuously and allows it to operate in modulated position.

  • Easy operation and maintenance with simple structure
  • Low cost
  • Working at wide pressure value range
  • Perfect modulation even at low flow rates
  • Continuous on / off with flexible aperture
  • Full seal with reinforced diaphragm and inner spring
  • Long life with epoxy-polyester coating
  • Wide range of control area with the use of different pilot valves
  • Ability to work in horizontal and vertical positions in application areas
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
Valve Diameter
2 50 65 3 80 4 100 5 125 6 150 8 200 10 250 12 300
CV m³/h @ 1 bar
88 88 174 187 187 419 1139 1698 2276
Kv gpm @ 1 bar
102 102 201 216 216 484 1316 1961 2629

KV: Valve flow Coefficient (Flow Rate At 1 Bar Pressure Loss M³/h @ 1 BAR)

CV: Valve flow Coefficient (Flow in pressure lossof 1 Psi GPM @ 1 Psi)

Q: Flow (M³/h, GPM)

ΔP: Pressure Loss (BAR, PSİ)

G: Specific Gravity of Water (For water = 1.0)

Installation
  • Valve rated diameter should be the same or smaller diameter as the line diameter.
  • In the direction of the arrow indicated on the valve Mount.
  • Insulation valves (butterfly or sliding valve etc.) on the line mounting of Valve B.  it is recommended to use air discharge valve, quick relief control valve (QR) and strainer valve.
  • Risk of sudden pressure fluctuation is dangerous to the valve body. Adjust the output pressure value you want to adjust by looking at the cavitation chart or contact our technical staff.
Adjusting
  • Turn on the pump or turn on the main valve in the network and give water to the system
  • Turn on the spherical valve indicated by “2” and turn off the spherical valve indicated by “2/1”
  • Wait a while for the water to reach the control Chamber of the valve. When water reaches the control chamber, the manometer needle will show a certain pressure value
  • Adjust the desired output pressure value by looking at the manometer with the adjustment Bolt indicated by “5” on the pilot indicated by “1”
  • When you turn the adjustment Bolt Clockwise, the output pressure value will increase in the opposite direction when you turn the output pressure value will be reduced
  • After adjusting the desired output pressure value, tighten the nut under the adjustment Bolt. Turn on the spherical valve indicated by “2” and give water to the system. “2/1” will display the manometer zero value after turning on the global valve
  • Check the output pressure value continuously. If the valve does not function, contact our company
Treatment
  • Check and clean the finger filter indicated by “3” due to the particles that may accumulate on it. Do not do more than one filter cleaning in a few months unless the water is very dirty.
  • Drain water from the unused valve and pilot during winter.

 

  1. Pressure Lowering Plot
  2. Ball Valves
  3. Brass Finger Filter
  4. Manometer
  5. Pressure Adjustment Bolt
  6. Needle valve

FLANGED

Available Diameters
mm 50 65 80 100 125 150 200 250
inch 2 3 4 5 6 8 10
Port
Flanged
Material
GG25 – GGG40
Body
Globe
Transmission Pressure
PN10 – PN16 – PN25

VICTAULIC

Available Diameters
mm 50 65 80 100 150
inch 2 3 4 6

 

Port
Victaulic
Material
GG25 – GGG40
Body
Globe
Transmission Pressure
PN10 – PN16 – PN25

THREADED

Available Diameters
mm 25 40 50 65 80×50 80
inch 1 2 3x2x3
Port
Threaded
Material
GG25 – GGG40
Body
Globe
Transmission Pressure
PN10 – PN16 – PN25

ANGELED

Available Diameters
mm 50 80 100 150
inch 2 3 4 6
Port
Flange – Threaded
Material
GG25 – GGG40
Body
Globe
Transmission Pressure
PN10 – PN16 – PN25