Yoshitake GD-7R direct type primary pressure regulating valve is designed for cold and hot water, oil, and other non-dangerous fluids. It features a simple structure that is less prone to fail and easy to maintain. It provides superior performance especially as a relief unit for lubricating oil and heavy oil.

Specifications

Specification	Detail
Application	Cold and hot water, Oil, Other non-dangerous fluids
Nominal size	20A-150A
Fluid temperature	5-80°C *2
Valve seat leakage	0.5% or less of rated flow rate
Fluid viscosity	700 cSt or less
Body Material	Cast iron
Valve disc, valve seat Material	Bronze *3
Piston Material	Bronze
Connection	JIS 10K FF flanged

Pressure Regulating Range

Nominal size	Range
20A-50A	0.05-0.25 MPa / 0.25-0.45 MPa / 0.45-0.7 MPa *1
65A-150A	0.05-0.2 MPa / 0.2-0.5 MPa / 0.5-0.7 MPa *1

Note

*1 Available with the GD-7RH, made of cast steel, with pressure regulating range of 0.7 to 1.6 MPa. *2 Available with maximum temperature of 120°C. *3 Available with stainless steel made valve disc and valve seat.

Dimensions and Weights

The shapes are slightly different above nominal size 65A.

Nominal size	L (mm)	H (mm)	H1 (mm)	Weight (kg)
20A	170	535	95	20
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	700	135	51
100A	300	750	160	66
125A	360	810	190	90
150A	382	875	220	129

Flow Rate Characteristics

Nominal size	Set range MPa	Accumulation MPa
20A-50A	0.05-0.25	Within 0.04
20A-50A	0.25-0.45	Within 0.06
20A-50A	0.45-0.7	Within 0.08
20A-50A	0.7-1.6	Within 0.23
65A-150A	0.05-0.2	Within 0.1
65A-150A	0.2-0.5	Within 0.14
65A-150A	0.5-0.7	Within 0.19
65A-150A	0.7-1.6	Within 0.32

Nominal Size Selection

Structural Drawing