3/8" Female Brass Pressure Sensitive Regulating Unloader

High-pressure pumping equipment—such as prep guns, underbody blasters, and high-pressure arch manifolds—requires precise pressure control to deliver maximum cleaning power without damaging system piping or overloading pump motors. The Pulsar 4KHP acts as a reliable pressure regulator. When spray guns or manifold solenoids close, the trapped pressure mechanism immediately redirects full water flow into a low-pressure bypass loop. This eliminates harmful pressure spikes, reduces thermal stress on pump heads, and extends the service life of your drive motors.

Key features and benefits include:

• High-Flow & High-Pressure Capacity: Handles up to 10.5 GPM flow rates and a rated pressure of 4,050 PSI (4,500 PSI maximum), making it ideal for multi-gun prep stations and high-pressure wash arches.
• Trapped Pressure Bypass Protection: Diverts pump discharge water to low-pressure bypass the moment discharge flow stops, protecting pump seals, hoses, and electric motors from destructive backpressure spikes.
• Adjustable Blue Spring with Locknut: Outfitted with an integrated adjustment knob and locknut, allowing site mechanics to fine-tune system pressure settings and lock in minimum/maximum operating parameters.
• Rugged Forged Brass Construction: Heavy-duty forged brass body housing with a stainless steel internal ball and seat ensures long service life in demanding, non-stop tunnel environments.
• Dual Porting Flexibility: Features dual 3/8" NPT-F inlets and dual 3/8" NPT-F bypass ports to allow easy plumbing alignment on any pump manifold layout.