Wanner Hydra-Cell Pro^® Model D40 Pump

9 to 40 GPM at pressures up to 1,200 PSI

The D40 was a sealless triplex Wanner Hydra-Cell Pro^® for continuous duty and for fluids and slurries with particles up to 1/8 inch. Into the early 2000s it was the frame above 20 GPM. The pentaplex D35 now covers almost the same duty — up to 36 GPM at 1,200 PSI — with smoother flow. Most new jobs go D35 unless the extra 4 GPM is required or the solids are larger than a D35 will pass.

The D35 pentaplex is built on the H25 triplex and uses the same inlet and outlet checks. Same relationship for D40 and D66: D40 is the triplex, D66 is five chambers on that larger valve set. D40 and D66 share check valves.

Maximum free passage on H25, D35, D40 and D66 is 800 micron. That number is at a stated RPM. At your speed the real passage is a little smaller. Inlet filtration should sit at about 25–50% of that maximum, depending on the particle.

D40 checks are larger than D35 checks. On abrasive slurry that can mean longer valve life — bigger seating area and a lower RPM for the same gallons, so lower velocity across the seat.

Wanner^® no longer lists the D40. This page stays up for installed pumps and for choosing D35 vs D66 when a D40 comes out of service.

Unique Features

• Sealless — no packing leak, no fugitive emissions, and abrasive liquid stays in the head
• Dry-run capable
• Particles to about 1/8 inch; 800 micron published free passage

Catalog and IOM

Related Pages

• D35 Hydra-Cell Pro (primary replacement)
• D66 Hydra-Cell Pro (same valve family, more flow)
• H25 Hydra-Cell Pro
• Check valve wear
• Hydra-Cell Pro design overview