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Cast iron rotary gear pump head with 1 inch NPT connections

Dayton

Dayton 4KHC9 Rotary Gear Pump Head Trap 1 in 125 psi

SKU CH-W538-C1ZMX MPN 4KHC9

Rotary gear pump head with 1 in NPT connection rated for 125 psi and 23.9 gpm flow

  • TypeDrain Components
  • Operates up to 125 psi for high-pressure systems
  • Flow rate of 23.9 gpm at 100 psi delivers strong output
  • Cast iron body resists wear in demanding environments
  • Compatible with 182TC and 184TC motor frames for flexible mounting
  • Temperature range from 32 to 280 degrees F handles varied conditions

Rotary Gear Pump Head 1 in 125 psi

The Dayton 4KHC9 is a cast-iron rotary gear pump head designed for industrial fluid transfer. It suits maintenance teams and plant operators who need a direct-coupled pump head for compatible 182TC or 184TC motor frames. The 1-inch NPT connections integrate with standard piping systems. It handles viscosities up to 550 SUS in continuous duty.

Thermals pressure and power envelope

The pump head operates between 32 and 280 degrees Fahrenheit at pressures up to 125 psi. At 100 psi it delivers 23.9 gpm while requiring a 3 hp motor. The mechanical seal uses Buna-N, carbon, ceramic and stainless steel components to manage heat and wear. Spur gear design provides steady flow without pressure spikes that increase motor load.

Seal materials and motor compatibility

The bundled mechanical seal combines Buna-N, carbon, ceramic and stainless steel for chemical resistance across the stated temperature range. Compatibility with 182TC and 184TC frames means the pump head bolts directly to those NEMA motors without adapter plates. The 3/4-inch shaft diameter matches the frame standard, reducing alignment time during installation.

Highlights

  • Operates up to 125 psi for high-pressure systems
  • Flow rate of 23.9 gpm at 100 psi delivers strong output
  • Cast iron body resists wear in demanding environments
  • Compatible with 182TC and 184TC motor frames for flexible mounting
  • Temperature range from 32 to 280 degrees F handles varied conditions

Specifications

TypeDrain Components
BrandDayton
Model4KHC9

Questions about this item

How do I mount this pump head to a 182TC or 184TC motor frame, and what alignment step is often missed?

Bolt the pump head to the compatible 182TC or 184TC frame, then align the 3/4-inch shaft precisely; the step often missed is checking parallel and angular alignment with a dial indicator before tightening the coupling.

Which wear parts will need replacement after extended use?

The mechanical seal with Buna-N, carbon, ceramic and stainless-steel faces and the spur gears are the primary wear items; plan to inspect the seal faces and gear teeth during scheduled maintenance.

At what pressure does the pump head reach its rated limit during continuous operation?

The maximum operating pressure is 125 psi; at that pressure the flow rate is 23.9 gpm, so sustained operation above 125 psi exceeds the design limit.

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