Pneumatic O-Port Shut-Off Valve
Reliable rapid shut-off for demanding conditions under multiple standards
Product overview
The pneumatic O-port shut-off valve covers DN15~300 and multiple pressure classes under Chinese, American and Japanese standards. Various body and seat materials are available. The spherical closure element provides low flow resistance, high flow capacity and excellent shut-off sealing. It can isolate flow rapidly or be paired with a valve positioner for precise modulation.
Double-acting and single-acting spring-return pneumatic actuators are available, with automatic return on air loss in the single-acting version. The valve supports on/off shut-off and continuous modulation, and its raised mounting pad can integrate a full range of automation accessories. The solid O-port ball provides high flow capacity and good sealing in a compact, wear- and corrosion-resistant structure, making this a general-purpose shut-off valve that also supports modulation.
Core technology and operating parameters
| Model | ZHSO |
| Nominal diameter | DN15~300 mm |
| Pressure | 1.6, 2.5, 4.0 (MPa); 150LB, 300LB; 10K |
| Dimensional standards | Chinese, American and Japanese standards |
| Valve body material | Carbon steel (WCB), stainless steel (CF8, CF8M) |
| Seat material | Polytetrafluoroethylene (F), poly-p-phenylene (P), hard alloy (Y) |
| Action type | Double-acting, single-acting (spring-return) |
| Control mode | Two-position shut-off (on/off), modulating |
| Optional accessories | Solenoid valve, valve positioner, limit switch, air preparation FRL unit, manual override |
Core construction and design advantages
Model ZHSO, DN15~300, with multiple high-pressure ratings
Flanges to Chinese, American and Japanese standards for import/export projects
Choice of WCB carbon steel or CF8/CF8M stainless steel body
Three seat materials for corrosive, hot and particle-laden media
Solid O-port ball provides high flow capacity and tight shut-off
Double-acting and single-acting spring-return drive designs
Combines two-position shut-off and flow modulation
Accepts a complete accessory package including positioner, solenoid valve and manual handwheel
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