- It is a valve type with metal oil gauge. 
- If the valve is designed compactly in the mounting bolt and the gauge pipe is damaged, oil leakage can be prevented by tightening the valve. 
- The body is chrome-plated brass, the gauge tube is PYREX glass, and the packing is fluoro rubber standard. 
- Heat resistance is 150 ℃, withstand pressure is 1.5MPa ~ 2.0MPa. 
- For intermediate lengths of 400 mm or more, an intermediate receiver is attached.