Yoshitake GP-1000TS is a pilot-operated pressure reducing valve designed for air and other non-dangerous fluids. Based on the proven GP-1000T series, the GP-1000TS model is upgraded with stainless steel trim parts (piston, cylinder, and valve) for enhanced durability and performance. It features a ductile cast iron body and operates with a JIS 10K FF flanged connection, supporting an inlet pressure range of 0.1 to 1.0 MPa.

Features

• Far superior to conventional pressure reducing valves in workability and durability.
• Free of valve seat leakage. Improved workability as a result of the refinement of sliding parts.
• Simple and robust internal structure.
• Stainless steel trim parts (piston, cylinder, and valve) for the GP-1000TS model.

Specifications

Specification	Value
Model	GP-1000TS
Application	Air, Other non-dangerous fluids
Inlet pressure	0.1 - 1.0 MPa
Reduced pressure	0.05 - 0.9 MPa (90% or less of inlet pressure)
Minimum differential pressure	0.05 MPa
Maximum pressure reduction ratio	20:1
Application temperature	5 - 80°C
Valve seat leakage	None
Connection	JIS 10K FF flanged

Material

Part	Material
Body	Ductile cast iron
Valve	Stainless steel
Valve seat	Stainless steel
Piston, cylinder	Stainless steel
Diaphragm	Stainless steel

Note on Materials

The standard GP-1000T utilizes brass/bronze for trim parts. The GP-1000TS explicitly upgrades the valve, piston, and cylinder to stainless steel for improved operational life.

Dimensions and Weights

Nominal size	L (mm)	H1 (mm)	H (mm)	Weight (kg)
15A	150	64	285	8.0
20A	155	64	285	8.5
25A	160	67	300	10.0
32A	190	82	323	14.0
40A	190	82	323	14.5
50A	220	93	347	20.0
65A	245	100	357	30.0
80A	290	122	404	35.0
100A	330	144	450	52.5

Selection Charts

Loading Air Pressure-set Pressure Chart

Specifications Selection Chart

Find the intersection point of the inlet and reduced pressures. If the intersection point is within range (A), the pressures are controllable. The valve does not fulfill specified performance if the intersection point lies in range (B). Basically, the set pressure to the loading air pressure is as shown in the chart above. The set pressure is slightly different depending on the conditions. In this case, adjust the loading air pressure.

Table of Corrected Cv Values

If the inlet pressure exceeds 0.7 MPa, and the pressure reducing ratio exceeds 10:1, find the appropriate correction coefficient C using the chart above, and multiply the rated Cv value, and obtain the corrected Cv value.

Example Calculation: Take a pressure reducing valve whose inlet pressure is 0.8 MPa, the reduced pressure is 0.05 MPa. Find the inlet and reduced pressure intersection point (A) at the above chart, then draw a horizontal line in the leftward direction to point (B) which indicates a correction coefficient of 0.85. For a nominal size of 25A, the corrected Cv value would be calculated as follows: 4 (rated Cv value) × 0.85 (correction coefficient) = 3.4

Characteristics Charts

Flow Characteristic Chart

Pressure Characteristic Chart

This chart shows variation in reduced pressure when the inlet pressure of 1.0 MPa is changed between 0.3 MPa and 1.0 MPa while the reduced pressure is set at 0.1 MPa.

Nominal Sizes Selection

Selection Example 1

When selecting the nominal size of a pressure reducing valve whose inlet pressure (P1), reduced pressure (P2), and air flow rate are 0.6 MPa, 0.4 MPa, and 1,000 m³/h (standard condition), respectively, first find intersection point (A) of the inlet pressure of 0.6 MPa and the reduced pressure of 0.4 MPa. Trace down vertically from this intersection point to find intersection point (B) with the flow rate of 1,000 m³/h (standard condition). Since intersection point (B) lies between nominal sizes 40A and 50A, select the larger one, 50A.

Selection Example 2

When selecting the nominal size of a pressure reducing valve whose inlet pressure (P1), reduced pressure (P2), and air flow rate are 0.8 MPa, 0.05 MPa, and 800 m³/h (standard condition), respectively, first find intersection point (C) of the inlet pressure of 0.8 MPa and the diagonal line. Trace down to the left from the diagonal line to find intersection point (D) with the reduced pressure of 0.05 MPa. Trace down vertically from intersection point (D) to find intersection point (E) with the flow rate of 800 m³/h (standard condition). Since intersection point (E) lies between nominal sizes 32A and 40A, select the larger one, 40A. Note: Set the safety factor at 80 to 90%.

Structure and Parts

Parts List (Excerpt)

• 38: Name Plate (Aluminum A1050P)
• 37: Plug (Carbon Steel S45C)
• 36: E Ring (Stainless Steel SUS)
• 35, 34, 33: Bolt (Carbon Steel SCM435)
• 32: Spring Pin (Stainless Steel SUS)
• 31: Bush (PTFE & Carbon Steel)
• 30: Gasket (PTFE)