Product Overview
The KOZO F11 Class 2500 Pressure Seal Forged Swing Check Valve is designed for high-pressure process, steam and power-generation systems where compact forged construction and a pressure-seal closure are required. The swing disc opens with forward flow and closes automatically when flow reverses, helping protect pumps, piping and process equipment from backflow.
Why ASTM A182 F11?
ASTM A182 F11 is a chromium-molybdenum alloy steel grade used in elevated-temperature and high-pressure service. It is commonly selected in power and process piping where carbon steel may not provide the required strength at temperature. Final service limits depend on pressure class, heat treatment, trim, bolting and the applicable piping code.
Key Design Features
- Forged body: Compact high-integrity construction for small-bore high-pressure service.
- Pressure-seal bonnet: Uses internal pressure to improve sealing load as system pressure rises.
- Swing-check mechanism: Automatic non-return operation without external actuation.
- High-pressure rating: Reference configuration up to ASME Class 2500.
- Multiple end connections: SW, NPT, flanged or butt-weld options may be available by configuration.
Technical Specifications
| Valve Type | Forged Swing Check Valve |
|---|---|
| Reference Pressure | ASME Class 2500 |
| Body Material | ASTM A182 F11 Alloy Steel |
| Construction | Pressure Seal |
| Design Standard | API 602 / ASME B16.34 |
| End Connection | SW / NPT / RF / BW options |
| Operation | Automatic non-return |
| Typical Service | High-pressure steam and process service |
Typical Applications
- Power-generation piping
- High-pressure steam systems
- Refinery and petrochemical service
- Boiler feed and utility systems
- High-pressure process isolation against reverse flow
Selection Notes
Pressure-seal check valves should be selected using the complete design envelope: pressure, temperature, flow velocity, orientation, minimum opening flow and allowable pressure drop. Material temperature capability alone should not be used as the valve service limit.
How to Specify This Valve
Please provide size, pressure class, material, end connection, medium, design temperature, design pressure and applicable standards.
FAQ
What is the benefit of a pressure-seal bonnet?
In a pressure-seal design, system pressure contributes to the sealing load of the closure joint, which is useful in high-pressure service.
Does a swing check valve require an actuator?
No. It operates automatically with flow direction and differential pressure.
