The Betts sliding valve is an economical manually operated external stop valve that provides a quick open or close function. The 316 stainless discs offer premium corrosion resistance and the adjustable packing nut with woven PTFE infused packing allows for easy stem adjustments. The metal-to-metal seal has advantages for many applications but is susceptible to wear and scratches. If a maintainable seal valve is required, please see Betts's line of replaceable o-ring seat sliding valves.