Yoshitake GD-7B is a pressure reducing valve designed for cold and hot water, oil, and other non-dangerous fluids. It features a simple structure that is easy to maintain and less prone to failure. The valve provides outstanding performance as a pressure reducer for lubricant grease and heavy oil, and its pressure balance structure ensures stable reduced pressure relative to the inlet pressure while increasing the maximum pressure ratio.

Features

• Simple in structure, less prone to fail and easy to maintain.
• Outstanding performance as a pressure reducer for lubricant grease and heavy oil.
• Pressure balance structure provides stable reduced pressure to inlet pressure and increased maximum pressure ratio.

Specifications

Model	GD-7B	GD-7B
Application	Cold and hot water, Oil, Other non-dangerous fluids	Cold and hot water, Oil, Other non-dangerous fluids
Nominal size	20A-50A	65A-150A
Reduced 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
	85% or less of inlet pressure (gauge pressure)	85% or less of inlet pressure (gauge pressure)
Minimum differential pressure	0.05 MPa	0.05 MPa
Maximum pressure reduction ratio	20:1	15:1
Application temperature	5-80°C*	5-80°C*
Valve seat leakage	None	None
Fluid viscosity	700 cSt or less	700 cSt or less
Material (Body)	Cast iron	Cast iron
Material (Valve disc)	Stainless steel (NBR disc incorporated)	Stainless steel (NBR disc incorporated)
Material (Valve seat)	Stainless steel	Stainless steel
Material (Spindle)	Stainless steel	Stainless steel
Material (Piston)	Bronze	Bronze
Connection	JIS 10K FF flanged	JIS 10K FF flanged

• Available with withstanding up to 120°C.
• Available with the GD-7BH, made of cast steel, with inlet pressure of 2.0MPa or less and reduced pressure of 0.7 to 1.6 MPa.

Dimensions and Weights

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	140	51
100A	300	750	165	66
125A	360	810	195	90
150A	382	875	225	129

INFO

Structure is different depending on nominal size.

Specifications Selection Chart

• Nominal sizes 20A to 50A

• Nominal sizes 65A to 150A

Flow Characteristic Chart

Nominal size	Shut-off pressure rise (GD-7B)	Shut-off pressure rise (GD-7BH)
20A-50A	Within 10% of set pressure	Within 15% of set pressure
65A-150A	Within 15% of set pressure	Within 15% of set pressure

Nominal size	Offset pressure MPa (GD-7B)	Offset pressure MPa (GD-7BH)
20A-50A	Within 0.08	Within 0.23
65A-150A	Within 0.11	Within 0.18

Nominal Sizes Selection Chart (For Water)

∆P: Differential pressure MPa

Detailed Drawings