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Primary pressure control valve Yoshitake GD-21

Primary pressure control valve Yoshitake GD21
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  • Manufacturer: Yoshitake (Japan)
  • Material: rubber, bronze
  • Action type: direct action

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  • Description
  • Specifications
  • Dimensions (mm) and weight (kg)
  • Equipment selection schedule
  • Delivery
  • Payment
  1. Most suitable as a drain valve for a pump in a closed circuit.
  2. No leakage when closed thanks to the single-seat valve and plug.
Parameter name Meaning
Application Cold and hot water
Differential pressure regulation 15A-80A (A) 0.05-0.25 MPa (B) 0.26-0.7 MPa 100A-150A (A) 0.05-0.25 MPa (B) 0.26-0.5 MPa
Liquid temperature Malleable cast iron
Material Frame Bronze
Valve seat Nitrile butadiene rubber
Valve plug Nitrile butadiene rubber
Membrane Flange connection JIS 10K FF
Compound JIS 10K FF flanged
Internal processing case surface 15A-100A: Electroplating 125A-150A: Resin (Black) or Electroplating

Example of a pipeline diagram

Пример схемы трубопровода

Install a needle valve at the outlet of the product and connect it with a copper tube to the impulse
tube.

Nom. the size L H H 1 b The weight
15A 145 298 57 36 8.3
20A 150 298 57 36 8.3
25A 150 320 67 36 10.1
32A 195 400 76 48 17.4
40A 195 400 76 48 17.4
50A 195 414 81 48 19.3
65A 270 572 110 63 40.1
80A 270 597 125 63 43.8
100A 308 665 143 68 70.1
125A 380 874 179 115 144.1
150A 400 929 204 115 173.1

габариты Yoshitake GD-21

Flow characteristics graph

График характеристик расхода GD-21

график подбора оборудования Yoshitake GD-21

(Example)
When selecting the nominal size of the differential pressure control valve at differential pressure (∆P), specific gravity and flow (V) 0.2 MPa, 1 (water) and 5.5 m3 / h, respectively, first draw down a vertical line from the value of the differential pressure (∆P) 0.2 MPa before the intersection (a) with the flow line (V) 5.5 m3 / h. Since this intersection point (a) lies between dimensions 25A and 32A, choose the larger of the two, 32A.
If the specific gravity is 0.7 under the same conditions, draw a vertical line down from the differential pressure (∆P) value of 0.2 MPa and find the intersection point (b) at specific gravity 1. Find the intersection point (c) at 0 specific gravity , 7 by drawing a horizontal line from point (b) to the intersection with the corresponding oblique line. Then find the point of intersection (d) with the flow line (V) of 5.5 m3 / h by drawing a vertical line downward from the point of intersection (c). Since this intersection point (d) lies between dimensions 20A and 25A, choose the larger of the two, 25A.
* Select GD-21 valve at specific gravity 1.

GD-21 Nominal sizing diagram (for air)


GD-21 Диаграмма подбора номинального размера (для воздуха)

  • Pickup from a warehouse in Kiev
  • New Mail
  • SAT
  • Deliveri
  • Courier in Kiev
  • Cashless payment with VAT
  • Online Privat24, Visa / MasterCard
Primary pressure control valve Yoshitake GD21

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