Pulsar 4 – 3/8″ NPT + EZ + Knob (PA unloader)

The PA Pulsar 4 is a heavy duty unloader valve for machines up to 40 L/min. This version has EZ Start, which lets water discharge freely during start-up so the engine is easier to turn over, and a hand knob so you can adjust pressure without tools.

Specifications / Features:

• Brand: PA
• Model: Pulsar 4
• Maximum Flow: 40 L/min
• Rated Pressure: 4,050 PSI
• Maximum Pressure: 4,500 PSI
• Maximum Temperature: 90°C
• Inlet: 3/8" NPT Female
• Outlet: 3/8" NPT Female
• Bypass: 2 x 3/8" NPT Female
• Adjustment: Hand knob with locknut
• Body: Brass, with stainless steel internals

Benefits:

• EZ Start reduces the load on the engine at start-up
• Tool-free pressure adjustment with the hand knob
• Two bypass ports for flexible plumbing
• Threads are NPT, not BSP, so check your fittings before ordering
• On hot water machines, fit it before the boiler
• Pair it with the PA VS310 safety relief valve