3PC Pneumatic Ball Valve BSPT (SUS316, Single Acting, 2000PSI)

Model: PAVP-04(S)

PAVP-04(S) is a high-pressure ball valve combining a precision-cast SUS316 3PC body with a pneumatic single-acting actuator. Supporting a 2000PSI pressure rating and equipped with an ISO5211 direct mounting pad as a standard specification, it is used for high-pressure fail-safe automatic shutoff lines in the chemical, plant, water/wastewater, and construction sectors.

Features

3PC Pneumatic Ball Valve BSPT (SUS316, Single Acting, 2000PSI) PAVP-04(S)

Frequently Asked Questions

Where are 2000PSI Fail-safe specifications needed?
They are used in sections such as high-pressure chemical transfer lines, high-pressure steam lines, and high-pressure flammable gas lines that must automatically transition to a safe state on air or power loss. The higher the pressure, the greater the consequences of leakage or malfunction, making Fail-safe functionality an essential safety design element.
How do I choose between single acting and double acting?
Single acting (spring return) automatically returns to Fail Close or Fail Open on air loss, making it suitable for lines where safety shutoff is critical. Double acting offers fast response and large torque margin, suited for high-speed, high-frequency control, but position retention is uncertain on air loss. Choose single acting (PAVP-04 (S)) when safety shutoff takes precedence, and double acting (PAVP-04 (D)) when high-speed automated control is the priority.
What advantage does the 3PC structure provide on high-pressure lines?
3PC allows the center body and two end caps to be separated, enabling seat and ball servicing without dismantling the pipeline. Pipeline disassembly itself is burdensome on high-pressure lines and complicates safety management, so the 3PC structure - which allows rapid seat and ball replacement only - is particularly useful for high-pressure automated shutoff valves.
How are Fail Close and Fail Open determined?
The safe shutoff direction is determined by process hazard analysis (HAZOP) results. Lines supplying flammable or hazardous substances need automatic shutoff on air loss, so Fail Close is selected; lines such as cooling water or cleaning water that must continue supplying use Fail Open.