Purchase now: Winner PB-19A-30-Y-8 Series 4 Valve
Purchase now: Atlantech Drives provides you the Winner Hydraulics PB-19A-30-Y-8. This is a massive Pilot Operated Pressure Reducing Valve, the largest in the standard range, fitting the Sun Hydraulics T-19A Cavity (Series 4). Designed for main-line pressure regulation in large-scale hydraulic systems (e.g., steel mills, marine hydraulics, press lines), this valve can handle flows exceeding 300 LPM (80 GPM) while maintaining precise downstream pressure control.
Technical Specifications and Main Line Control
The PB-19A is a critical component for system safety and efficiency. It steps down high main-line pressure to protect downstream components that have lower pressure ratings. Despite its large physical size and flow capacity, the pilot operation ensures it responds quickly to pressure spikes. The «30» configuration sets the adjustment range ceiling at 210 Bar. The cartridge construction allows for easy servicing without removing the huge manifold block from the machine.
- Part Number: PB-19A-30-Y-8.
- Size: Series 4 (Mega Flow).
- Cavity: T-19A (Sun Interchange).
- Flow Rate: 320+ LPM (80 GPM).
- Type: 3-Port Reducing Valve.
- Pressure: 210 Bar Regulation.
- Material: Hardened Steel working parts.
- Pilot Flow: Low continuous consumption.
Maintenance: Filtration for Large Valves
Big valves fail too. Expert Tip: You might think a large Series 4 valve is immune to dirt, but the Pilot Orifice inside is still tiny (approx 0.5mm). If sludge blocks this orifice, the valve will fail to regulate (it will stay fully open, passing high pressure downstream). On large systems using PB-19A valves, we recommend a dedicated pilot filter or ensuring the main system filtration is maintained at ISO 18/16/13 to prevent catastrophic over-pressure events.
Frequently Asked Questions (FAQs)
Q: Why is this valve so expensive?
A: It’s a Series 4 cartridge. The machining precision required for a spool of this diameter (to prevent massive internal leakage) and the hardened materials make it a premium component.
Q: Can I mount it in any orientation?
A: Yes, cartridge valves operate independently of gravity. However, ensure the adjustment screw («8») is accessible for maintenance.
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