H grease pumps are designed for constant use in medium and high pressure mining applications No external aluminium so ideal for underground coal applications Double acting 50:1 3" air motor H pumps easily handles lightweight as well as fibrous lubricants up to NLGI2Maximum operating / delivery pressure: 100psi / 5000psi Approximate delivery: 1.13kg per minute Double toggle balances pressure on air valve trip mechanism to prevent binding or stalling Dynamic primer ensures handling of light to heavy multi purpose greases complete with drum cover and flexible follower plate works with straight and tapered containers Corrosion-resistant hardened finish on piston rods alleviates packing wear Centre flow, micro-lapped high-pressure air valve lasts indefinitely Self aligning, heavy acme threads provide safely locked linkage Air inlet: 1/4" NPTF Material outlet: 3/8" NPTF