Yoshitake GP-1200TSS is an air-loaded, pilot-operated pressure reducing valve designed for air and non-corrosive gases. It features wetted parts made of stainless steel, improving corrosion resistance and extending service life. The air-loaded design allows for remote pressure setting and stable control over a wide range of flow rates.

Features

• Stainless steel is used for wetted parts (GP-1200TSS), significantly improving corrosion resistance.
• Zero valve seat leakage, with improved workability as a result of the refinement of sliding parts.
• Simple and robust internal structure.

Specifications

Specification	Value
Application	Air, Other non-dangerous fluids
Control Type	Air-loaded type
Inlet Pressure	0.1 - 1.0 MPa
Reduced Pressure	0.05 - 0.9 MPa
Adjusted Reduced Pressure	90% or less of inlet pressure (gauge pressure)
Minimum Differential Pressure	0.05 MPa
Maximum Pressure Reducing Ratio	20:1
Application Temperature	5 - 80°C
Valve Seat Leakage	None
Connection	JIS 10K FF Flanged

WARNING

Use on a compressed air system with dry air from oil-free compressors may cause deterioration of rubber parts in a very short time (ozone crack). Please consult with Yoshitake before such installation.

Dimensions and Weights

The following dimensions apply to the flanged GP-1200TSS models.

Nominal Size	L (mm)	H1 (mm)	H (mm)	d0	Weight (kg)
15A	150	67	223	Rc 1/4	8.3
20A	155	67	223	Rc 1/4	8.8
25A	160	70	238	Rc 1/4	10.5
32A	190	85	261	Rc 3/8	14.8
40A	190	85	261	Rc 3/8	15.3
50A	220	96	285	Rc 3/8	20.8

Structure

The pressure reducing valve reduces pressure by throttling the valve. The valve is composed of the main valve and main valve seat for throttling, and air-loaded pressure (since the remote control type is used), diaphragm, pilot valve, and piston for pressure sensing and activation.

Selection Charts

Specifications Selection Chart

Find the intersection point of the inlet and reduced pressures. The GP-1000T series valves are suitable within range (A). When within range (B), maximum performance cannot be obtained.

Loading Air Pressure-Set Pressure Chart

The setting pressures corresponding to the loading pressure are shown in the chart. As slight deviations from the loading pressure-setting pressure chart line may occur depending on conditions, such as the length of the air line, a setting pressure which is high enough to cover such deviations should be selected.

Nominal Size Selection Chart