EXPANDING SEAL PAGE 67 MODEL M WORKING PRESSURE: 2000, 3000 AND 5000 PSI Molybdenum disulfide coating on the stem provides a permanent lubrication for easier opening and closing. A double row of roller thrust bearings on the stem makes operation easy, even under full pressure. Plastic/chevron packing stays clean and free from contaminants to reduce maintenance costs. Dead-tight mechanical seal is assured with APV’s parallel expanding gate design.This design provides simultaneous upstream and downstream sealing which is not affected by pressure fluctuations or vibration. Replaceable seats. Easy-to-reach seats can be replaced without removing the valve from the line. Full bore flow minimizes pressure drop and turbulence and allows passage of tools through the valve. 11 API6A GATE VALVES