Max. service pressure of 2.0 MPa thanks to OKM’s proprietary mechanism
High-performance service temperature of -50°C to 400°C

Self-sealing mechanism ensures tight shutoff

OKM has developed a new mechanism that ensures close contact for both the fluid and the seat depending on the fluid pressure applied to the disc and seat. A higher fluid pressure results in a firmer seal, allowing for even greater reliability. Even in situations where bi-directional pressure is applied from both sides, the structure ensures that the fluid and the seat remain in close contact.

Long service life and low torque eccentric, double-flanged structure

The eccentricity of both A and B is designed to keep the disc and seat in a non-contact state until fully closed. This eccentric, double-flanged structure provides two notable benefits.

1. Eccentric, double-flanged disc structure
   The reduced friction between the main unit seat and the disc means a longer service life of the seat in addition to operation with minimal torque.
2. Extremely simple seat replacement
   Removing the valve-side set pin of the set ring allows the seat to be removed, enabling simple on-site seat replacement.

Three seat variations for wider support

he seat is available in three different variations: a synthetic rubber seat, a Teflon^® seat, and a metal seat. This allows for usability with a wide range of fluids and control conditions—from slurry sludge and chemicals to high-pressure steam.

1. Synthetic rubber seatWith support for controlling high-temperature fluids up to 150°C as well as abrasive sand-like fluids, this seat is perfect for general-purpose butterfly valves.
2. Teflon® seatThe Teflon® seat adds usability with highly corrosive chemicals and high-temperature fluids up to 232°C.
3. Metal seatThe metal seat can be applied to high-temperature fluids that cannot be controlled using rubber or Teflon® seats. Such seats can also be used as a substitute for gate valves, globe valves, and ball valves.