General Pump PULSAR4KHP Unloader — High-Flow Pressure-Relief Valve, Adjustable Setpoint

The General Pump PULSAR4KHP Unloader is a rugged pressure-relief and regulation valve designed to protect high-horsepower piston pumps by diverting fluid flow when trigger pressure is reached.

The PULSAR4KHP unloader is built to manage high flow and pressure in demanding cleaning and industrial spray systems. Engineered for longevity and consistent performance, it prevents overpressure by opening a bypass path when the pump reaches its set pressure, reducing strain on the pump, hose, and accessories. Compact and serviceable, this unloader adapts to a range of high-horsepower General Pump units and compatible commercial pumps from other manufacturers.

How does the PULSAR4KHP protect my pump during operation?

The unloader protects the pump by releasing excess pressure back to the inlet or low-pressure side once the pump reaches the preset limit. This cycling action reduces heat buildup and minimizes wear on seals and valves, extending pump life without interrupting system readiness.

• Automatic pressure diversion when setpoint is hit
• Reduces continuous dead-heading and overheating
• Preserves seals and internal components for longer service intervals

What settings and adjustments does the PULSAR4KHP offer?

The PULSAR4KHP features an adjustable pressure screw for fine-tuning the trip point to match system requirements. It provides stable, repeatable performance across a range of working pressures, and can be tuned by technicians using standard tools.

• Adjustable setpoint for tailored system pressure
• Locking hardware to secure the selected pressure
• Designed for simple calibration during routine maintenance

Which installations and pump types is this unloader suited for?

This unloader is intended for high-horsepower reciprocating (plunger/piston) pumps in commercial and industrial cleaning, pressure-wash, and fluid-transfer applications. It fits systems where consistent, reliable pressure control and pump protection are priorities.

• Compatible with high-horsepower General Pump models
• Works with many commercial pressure-washer and process-pump setups
• Recommended for systems with frequent trigger cycling or heavy-duty use

What maintenance and service should I expect?

Routine inspection and occasional cleaning of the unloader keep it functioning reliably. Replace seals and wear parts as part of a scheduled pump service to maintain accurate pressure control and prevent leaks.

• Periodic seal and valve checks recommended
• Serviceable internal components for cost-effective repair
• Simple disassembly with common tools for maintenance

Who is this for: The General Pump PULSAR4KHP unloader is aimed at professional users—service shops, pressure-washing contractors, fleet operators, and industrial maintenance teams—who run high-horsepower pumps and need a compact, adjustable valve to safeguard equipment, maintain consistent operating pressure, and reduce downtime. If you manage heavy-use wash rigs or process pumps and require a dependable pressure-control solution, the PULSAR4KHP offers a practical balance of durability, adjustability, and serviceability.