GOOD SEALING -- Whether opened or closed, the movement direction of the gate is perpendicular to the medium flow direction. The full bore will not limit the flow and has small resistance to the flow. The NPT thread ensures the gate valve tightness and good compatibility with other material thread pipes. EXPLOSION-PROOF & WEAR-RESISTANT -- The gate valve is made of 304 stainless steel. The valve body is characterized by pressure and explosion resistance, high temperature resistance and durability... It has uniform wall thickness, high wear-resistant strength and long service life. SUPERB CRAFTSMANSHIP -- The gate valve inner wall polishing treatment, smooth surface, no scaling, no clogging, practical and durable. WIDE RANGE OF USES -- A variety of specifications are available for most piping systems. Widely used in chemical, construction, petroleum, light and heavy industry, fire fighting, electric power, aerospace, shipbuilding ... INSTRUCTION -- Maximum working pressure: 1.6 MPa / 232.06 psi. Applicable temperature: FROM -196℃ TO +800℃（FROM -320.8℉ TO 1472℉）, media range: water, oil, non-corrosive flammable gas. Please select the appropriate size the gate valve according to the size chart. 4" NPT Stainless Steel Gate Valve, Heavy Duty Female x Female Thread Manual Rotary Sluice Valve with Wheel Handle for Water, Oil, Gas, Industrial Plumbing, and HVAC Systems (4", DN100)