This document introduces the features and characteristics of high pressure needle valves, including the maximum working pressure, maximum working temperature, leak detection function, bottom gasket structure, non-rotating stem design, end connection method, etc.
This document provides specifications, material options, and connection details for Swagelok high‑pressure needle valves in the B‑283 to B‑288 series. It includes maximum operating pressure and temperature, stem material choices, and optional Grafoil packing for high‑temperature service.
Additional sections cover air‑actuated valve configurations, accessory kits, and ordering instructions for stem, packing, and handle options. Safety and installation notes are also included. This manual is written in Japanese.
| Maximum operating pressure | 310.0 MPa |
|---|---|
| Maximum operating temperature | 232 °C |
| End connection types | High‑pressure parallel thread, NPT thread |
| Standard stem material | 440C stainless steel |
| Optional Grafoil stem packing temperature limit | 454 °C |
| Torque required to close at max pressure | 5.7 N·m |
The B‑283 valve is rated for a maximum operating pressure of 310.0 MPa.
A torque of about 5.7 N·m is required to close the valve at the maximum pressure.
Yes, the optional Grafoil stem packing is rated for use up to 454 °C.
The valves are offered with high‑pressure parallel threads and NPT threads as end connections.