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Bronze rotary gear pump head with 1/4 inch NPT ports

Dayton

Dayton 4KHH7 Rotary Gear Pump Head, Bronze, 1/4" NPT, 100 psi, 1.9 gpm

SKU CH-E9V1-GGDPV MPN 4KHH7

Bronze rotary gear pump head delivers 1.9 gpm at 100 psi with 2.5 ft suction lift

  • TypeDrain Components
  • Delivers 1.9 gpm flow for consistent fluid transfer
  • Bronze body resists corrosion in demanding environments
  • Withstands up to 100 psi operating pressure
  • Operates from -20 to 210 degrees F for wide temperature range
  • Handles viscosity up to 550 SUS for versatile applications

Rotary Gear Pump Head 1/4" NPT

The Dayton 4KHH7 is a bronze rotary gear pump head designed for fluid transfer in industrial and commercial plumbing systems. It connects via 1/4-inch NPT threads and delivers a flow rate of 1.9 gpm at 100 psi. The unit suits maintenance teams and equipment builders needing a compact, positive-displacement pump head for lubricating oils or similar media.

Sustained-load behaviour at 100 psi

Under continuous operation the pump head handles pressures up to 100 psi and viscosities up to 550 SUS. Bronze construction and Kevlar-PTFE packing resist wear from extended duty cycles. The assembly tolerates fluid temperatures from -20 to 210 degrees Fahrenheit and a maximum suction lift of 2.5 feet. It requires a 1/3 hp motor turning a 1/2-inch shaft for rated output.

Upgrade path and fit constraints

This head replaces worn or undersized gear pump heads on existing motor frames where a 1/4-inch NPT connection and 1/2-inch shaft match the drive. The jump is worth it when the current unit cannot reach 100 psi or 1.9 gpm at the target viscosity. Buyers needing larger ports, higher flow or a different shaft diameter should select an alternative model.

Highlights

  • Delivers 1.9 gpm flow for consistent fluid transfer
  • Bronze body resists corrosion in demanding environments
  • Withstands up to 100 psi operating pressure
  • Operates from -20 to 210 degrees F for wide temperature range
  • Handles viscosity up to 550 SUS for versatile applications

Specifications

TypeDrain Components
BrandDayton
Model4KHH7

Questions about this item

How much heat does the bronze pump head generate when running continuously at 100 psi?

The pump head is rated for a maximum operating temperature of 210 degrees F and a minimum of -20 degrees F, so it handles continuous operation within that range.

What motor shaft size and horsepower are needed to drive the 1/2 inch shaft on this pump head?

The pump head has a 1/2 inch shaft outer diameter and requires a 1/3 hp motor to deliver the rated 1.9 gpm at 100 psi.

Will the NPT connections on this pump head thread directly into older iron pipe fittings?

Yes, the 1/4 inch NPT connection type is a standard taper thread that mates with existing NPT fittings in older plumbing systems.

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