Low Lift Brownze Safety Relief Valve Screwed End to BSPT, NPT, BSP Thread. With Lever. Set: 3.5 / 7.0 / 10 KGS. T-ONE-S (MFG) Trading Inc. Taiwan Manufacturer 

SV-B29 optional Pressure: 10.5~20 Kgf/cm2
When placing order, please indicate Working Pressure
The Disc can be replaced with PTFE for good effect of anti-leakage.