PM4 series air operated piston pumps. Double acting air operated medium pressure high volume pumps for dispensing lubricants in medium size installations. Pumps include height adjustable 2” BSP (M) bung adaptor for drum and tank bung mounting. Built in port for optional pressure relief valve (PN 609 007). Air consumption with 6 bar (87 psi) air inlet pressure and 10 l/min (2.6 gal/min). Maximum free delivery at 7 (102 psi) bar. Maximum noise level measured at 1 m (3') from the pump, 7 bar (102 psi) air pressure and free delivery