Gauge Root Valves Features PANAM Gauge Root Valves. Gauge Root Valves are available in SS 316, Duplex, Monel & Hastelloy Materials. Maximum working pressure up to 10,000 psig. (689 bar). Size ranging from 1/2″ to 3/4”. PTFE standard gland packing, Alternate graph oil packing for high temperature. temperature upto 538°C (1000°F). Non-Rotating Vee-tip / ball tip provides repetitive & leak tight shut-off. Available in soft seat. NACE certification available upon request. Heat code traceability.