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YOSHITAKE GD-4B Pressure Reducing Valve – Air

Made in Japan
Manufacturer: Yoshitake
Model: GD-4B

  • High accuracy
  • Stable low pressure control
  • Balance type leads to large reduction ratio

Specifications

Features For air, slight pressure, reduction ratio 20:1
Type Direct-acting type
Specifications Product type Direct-acting type
Nominal size 15A (1/2″) – 150A (6″)
Application Air, other non-dangerous fluids
End connection JIS 10K FF flanged
Inlet pressure Max. 800 kPa (*Max. 500kPa for 65-150A)
Reduced pressure 2 – 200 kPa (*1)
Reduced pressure 85% or less of the inlet pressure(gauge pressure)
Min. differential pressure 3 kPa (Φ256)
Working temperature 5 – 80 degree(C)
Material Body Cast iron
Main valve NBR and stainless steel
Main valve seat Stainless steel
Diaphragm NBR

Remarks

*1 Contact us pressure range for each valve.
*2 Min. differential pressure
Diaphragm
Dia. 256mm: 3 kPa
Dia. 340 mm: 2 kPa
Dia. 400 mm: 1 kPa
*3 Max. pressure reduction ratio
20-50A — 20:1
65-150A — 15:1

Diaphragm Dia. 256mm type

Size L (mm) H (mm) Weight (kg) Cv value
20A(3/4) 170 570 27 2
25A(1) 170 570 28 3
32A(1 1/4) 180 580 28 4
40A(1 1/2) 180 580 29 5
50A(2) 180 600 31 8
65A(2 1/2) 215 695 39 12
80A(3) 260 715 48 16
100A(4) 300 785 64 24
125A(5) 360 840 88 36
150A(6) 382 895 123 48

About flow rate

Specification Selection Chart
Nominal Size Selection Chart

Dimensional drawing

Dimensional drawing

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