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Reducing valve for water and oil Yoshitake GD-7

Reducing valve for water and oil Yoshitake GD7
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  • Manufacturer: Yoshitake (Japan)
  • Material: cast iron, stainless steel, bronze
  • Action type: direct action

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  • Description
  • Specifications
  • Dimensions (mm) and weight (kg)
  • Equipment selection schedule
  • Delivery
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  1. Simple design, less prone to failure, easy maintenance.
  2. Insensitive to inlet pressure differences due to its dual construction.
  3. Highly effective when used to relieve the pressure of viscous oils and greases.
Model GD-7
Application Cold and hot water, oil, other non-hazardous liquids
Nominal size 20A-50A 65A-150A
Inlet pressure 0.1-1.0 MPa
Low pressure (A) 0.05-0.25 MPa (B) 0.25-0.45 MPa (C) 0.45-0.7 MPa (A) 0.05-0.2 MPa (B) 0.2-0.5 MPa (C) 0.5-0.7 MPa
Up to 70% of inlet pressure (gauge)
Min. differential pressure 0.05 MPa
Max. differential pressure 0.7 MPa
Max. coeff. pressure reduction 10: 1
Operating temperature 5-80 ° C * 1
Fluid viscosity No more than 700 cSt
Material Frame Cast iron
Valve, valve seat Phosphor Bronze * 2
Stock Stainless steel
Plunger Bronze
Compound Flange connection JIS 10K FF

*1. Available with a maximum operating temperature of 120 ˚C.

* 2. Available with stainless steel valve and valve seat.

Cast steel GD-7H models are available (inlet pressure - no more than 2 MPa, outlet pressure regulation range - 0.7-1.4 MPa).

Leakage through valve seat (l / min):

Nominal size twenty 25 32 40 50 65 80 100 125 150
Leakage 0.16 0.2 0.25 0.32 0.4 0.52 0.64 0.8 1.0 1.2
Nominal size L H H 1 The weight
20A 170 535 95 twenty
25A 170 535 95 twenty
32A 180 545 100 23
40A 180 545 100 23
50A 180 565 110 26
65A 215 680 125 41
80A 260 700 135 51
100A 300 750 160 66
125A 360 810 190 90
150A 382 875 220 129

схема Yoshitake GD-7

The design differs depending on the nominal size.

Selection chart of technical characteristics

Диаграмма подбора технических характеристик Yoshitake GD-7

Flow characteristics graph

Nominal size Cut-off pressure increase
20A-50A Not more than 10% of the pressure setting
65A-100A No more than 15% of the pressure setting
125A-150A Not more than 20% of the pressure setting

График характеристик расхода Yoshitake GD-7

* Pressure offset

Nominal size Pressure displacement, MPa
GD-7 GD-7H
20A-50A No more than 0.08 No more than 0.23
65A-150A No more than 0.11 No more than 0.18

Valve pressure characteristic

Характеристика давления клапана Yoshitake GD-7

This graph shows the change in reduced pressure when the pressure of 0.5 MPa at the valve inlet begins to fluctuate between 0.5 MPa and 1.0 MPa, while the reduced pressure is set at 0.2 MPa.

Nominal sizing diagram (for water)

Диаграмма подбора номинального размера (для воды) Yoshitake GD-7

  • Pickup from a warehouse in Kiev
  • New Mail
  • SAT
  • Deliveri
  • Courier in Kiev
  • Cashless payment with VAT
  • Online Privat24, Visa / MasterCard
Reducing valve for water and oil Yoshitake GD7

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