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Reducing valve for water and oil Yoshitake GD-7B

Reducing valve for water and oil Yoshitake GD7B
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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
  • Payment
  1. Simple design, less prone to failure, easy maintenance.
  2. Highly effective when used to relieve the pressure of viscous oils and greases.
  3. The pressure balanced design of the valve provides a stable underpressure and a high pressure reduction ratio.
Model GD-7B
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 85% of inlet pressure (gauge)
Min. differential pressure 0.05 MPa
Max. coeff. pressure reduction 20A-50A: 20: 1 65A-150A: 15: 1
Operating temperature 5-80 ° C *
Valve seat leaks No
Fluid viscosity No more than 700 cSt
Material Frame Cast iron
Valve NBR
Valve seat Stainless steel
Stock Stainless steel
Plunger Bronze
Compound Flange connection JIS 10K FF

Models available with a maximum operating temperature of 120 ˚C.

The GD-7BH cast steel model is available, with a pressure regulation range of 0.7-1.6 MPa and an inlet pressure of no more than 2.0 MPa.

Nominal size L H H 1 The weight
20A 170 535 95 twenty
25A 170 535 95 22
32A 180 545 100 23
40A 180 545 100 23
50A 180 565 110 26
65A 215 680 125 41
80A 260 705 140 51
100A 300 755 165 66
125A 360 815 195 90
150A 382 885 225 129

схема Yoshitake GD-7B


The design differs depending on the nominal size.

Diagram of selection of technical characteristics. Nominal size 20A-50A.

Диаграмма подбора технических характеристик. Номинальный размер 20А-50А.

Diagram of selection of technical characteristics. Nominal size 65A-150A.

Диаграмма подбора технических характеристик. Номинальный размер 65А-150А.

Flow characteristics graph

Nominal size Cut-off pressure increase
GD-7B GD-7BH
20A-50A Not more than 10% of the setting pressure Not more than 15% of the setting pressure
65A-150A Not more than 15% of the setting pressure Not more than 15% of the setting pressure

График характеристик расхода

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

Nominal sizing diagram (for water)

Диаграмма подбора номинального размера (для воды)

  • 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 GD7B

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