Pressure Sustaining Control Valve

Pressure Sustaining Control Valve is a hydraulic control valve designed to protect the system by rapidly discharging the high pressure wave by sudden opening movement in water systems with excessive pressure increase. With the pilot on the valve, the input pressure is adjusted with the desired pressure. If for any reason the inlet pressure in the system rises above the set value, the valve is opened quickly to release the excess pressure to the outside and the system is protected. Despite its sudden opening, due to the hydraulic principle of operation, the closing of the valve is slowed down so as not to create a ripple. It provides a completely leak-tight seal. It can also be used as a safety and warning valve at the exit points of the pressure reducing control valves alone at critical points in the water system.

Existing Diameters According To Their Connections

Flanged:

DN50, …, DN300


Threaded:

3/4″, 1″, 1¼”, 1½”, 2″, 2½”, 3″


Angeled:

2″, DN50, DN80, DN100, DN150


Victaulic:

2″, 3″, 4″, 6″


  • 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

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.

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
FLANGED
INGREDIENTS
Port Flange
Material GG25 – GGG40
Body Globe
Transmission Pressure PN10 – PN16 – PN25
Available
Diameters
mm 50 65 80 100 125 150 200 250
inch 2 3 4 5 6 8 10
VICTAULIC
INGREDIENTS
Port Victaulic
Material GG25 – GGG40
Body Globe
Transmission Pressure PN10 – PN16 – PN25
Available
Diameters
mm 50 65 80 100 150
inch 2 3 4 6
THREADED
INGREDIENTS
Port Threaded
Material GG25 – GGG40
Body Globe
Transmission Pressure PN10 – PN16 – PN25
Available
Diameters
mm 25 40 50 65 80×50 80
inch 1 2 3x2x3 3
ANGELED
INGREDIENTS
Port Flange – Threaded
Material GG25 – GGG40
Body Globe
Transmission Pressure PN10 – PN16 – PN25
Available
Diameters
mm 50 80 100 150
inch 2 3 4 6
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
  • After connecting to the valve Inlet, finger filter number 3 and mini ball valve number 2, connection to the “I” outlet of the pressure stabilizer pilot is provided with copper or plastic pipe.
  • The “II” output of the metal pilot is entered to the valve cover with the necessary connection elements.
  • Valve output is connected to mini ball valve No. 2/1. Connection to the “III” output of the metal pilot is provided from here. Finally, the other output of the Te connection element is connected to the manometer.
  • Valve rated diameter should be the same or a small rated diameter as the line diameter.
  • In the direction of the arrow indicated on the valve Mount.
  • Isolation valves (butterfly or sliding valve etc.) in the line Assembly of the valve.B) it is recommended to use air discharge valve, quick pressure discharge control valve (QR) and dirt retaining valves.
  • Cavitation risk during pressure drop is dangerous for valve body. Adjust the output pressure value you want to adjust by looking at the cavitation chart or contact our company.
Adjusting
  • Turn on the pump or turn on the mains main valve and give water to the system.
  • Wait a few seconds for the water to reach the control Chamber of the valve.
  • When you turn the adjustment bolt “5” Clockwise, the adjustment pressure value will increase, otherwise it will decrease when you turn it in the direction.
  • After adjusting the desired inlet pressure value, tighten the nut under the adjustment Bolt.
  • Check and clean the finger filter indicated by “2” according to the water quality. Do not do more than one filter cleaning in a few months unless the water is very dirty.
  • Drain the water in the actuator and pilot valves of the valves that are not used during the winter season.
  1. Pressure Relif Pilot
  2. Mini Ball Valve
  3. Finger Filter
  4. Manometer
  5. Pressure Adjustment Bolt
Installation
  • Connection to the “I” outlet of the pressure stabiliser pilot and the “C” outlet of the 3-way valve with the Te connection element is provided after connection to the valve Inlet, 2-finger filter, with the help of the plastic pipe.
  • The “II” output of the plastic pilot is connected to the “I” output of the plastic pilot with the necessary connection elements.
  • The plastic pilot’s “III” output is connected to the auto “A” output of 3-way valve and the valve output is connected to the “3” blind plug.
  • Valve rated diameter should be the same or a small rated diameter as the line diameter.
  • In the direction of the arrow indicated on the valve Mount.
  • Isolation valves (butterfly or sliding valve etc.) in the line Assembly of the valve.B) it is recommended to use air discharge valve, quick pressure discharge control valve (QR) and dirt retaining valves.
  • Cavitation risk during pressure drop is dangerous for valve body. Adjust the output pressure value you want to adjust by looking at the cavitation chart or contact our company.
Adjusting
  • Turn on the pump or turn on the mains main valve and give water to the system.
  • Turn the 3-way valve to Auto “a” position.
  • Wait a few seconds for the water to reach the control Chamber of the valve.
  • When you turn the adjustment bolt “5” Clockwise, the adjustment pressure value will increase, otherwise it will decrease when you turn it in the direction.
  • After adjusting the desired inlet pressure value, tighten the nut under the adjustment Bolt.
  • Check and clean the finger filter indicated by “2” according to the water quality. Do not do more than one filter cleaning in a few months unless the water is very dirty.
  • Drain the water in the actuator and pilot valves of the valves that are not used during the winter season.
  1. Pressure Lowering Pilot
  2. Finger Filter
  3. Blind Plug
  4. 3 Way Valve
  5. Pressure Adjustmant Bolt

2019 | Tayfur Su Sistemleri

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