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Dayton rotary gear pump cast iron half-inch NPT ports one-third horsepower

Dayton

Dayton 6DHH9 Rotary Gear Pump 1/3 hp 1/2 in NPT 40 psi 115/230V

SKU CH-SCHM-472RW MPN 6DHH9

Rotary gear pump delivers up to 40 psi with a 1/3 hp motor on 115/230V AC

  • Product typeDrain Components
  • Handles fluids up to 100 SUS viscosity with spur steel gears
  • Maximum 40 psi pressure suits moderate-demand transfer tasks
  • Operates from 40 to 375 °F for wide temperature range
  • Single-phase 115/230 V motor simplifies electrical hookup
  • Totally enclosed fan-cooled enclosure protects motor in harsh environments

Application fit

The Dayton 6DHH9 is a rotary gear pump rated for 40 psi maximum operating pressure and 1/3 hp motor output. It handles fluids up to 100 SUS viscosity through 1/2 in NPT inlet and discharge ports. The unit runs on single-phase 115/230V AC power with a totally enclosed fan-cooled motor enclosure.

Sustained operation

Operating temperature spans from 40 Degrees F to 375 Degrees F, allowing continuous duty across a wide thermal range. The spur gear design uses steel gears for consistent displacement under load. Motor protection comes from the totally enclosed fan-cooled housing, which dissipates heat during extended run cycles without external ventilation requirements.

Upgrade context

This pump replaces older units that lack the 375 Degrees F upper temperature limit or the dual-voltage 115/230V flexibility. The jump is worthwhile when the application demands both higher temperature tolerance and voltage adaptability in a single package. It does not suit systems requiring pressures above 40 psi or viscosities exceeding 100 SUS.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $424.99
Pricier than about 90% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name6DHH9
Product typeDrain Components

Questions about this item

How much heat does the 1/3 hp motor generate when the pump runs continuously at 40 psi?

The motor is totally enclosed fan cooled and rated for operation up to 375 °F, so sustained duty at 40 psi stays within its thermal design.

What piping and power supply must already be in place for this 1/2 in NPT pump?

You need 1/2 in NPT inlet and outlet piping plus a single-phase 115/230 V AC circuit matched to the motor nameplate.

Will the steel spur gears handle the same 100 SUS fluid that my older cast-iron pump moved?

Yes — the steel spur gears are rated for viscosity up to 100 SUS, matching the fluid spec of your existing system.

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