Valve is the work-horse of the industry and is fast becoming the standard that other hard seat needle valves are judged against. 10000 psi pressure rating at 200 degree F maximum. Viton O-ring seal and Teflon back-up ring below the stem threads to protect from corrosion and galling. All stem threads are rolled for strength and ease of operation. Bonnet lock pin to prevent accidental loosening. Vinyl bonnet and stem dust cap. Angled stem for precise flow metering.