UNIVAL HYDRAULIC SHUTOFF HIGH PRESSURE BALL VALVE KHB-NPT1 315BAR DN25 15:56

The UNIVAL KHB-NPT1 is a robust, two-way shut-off ball valve engineered specifically for demanding high-pressure hydraulic and industrial fluid applications. Its primary function is to provide a positive, bubble-tight seal to completely isolate sections of a circuit for maintenance, safety, or system configuration. The “KHB” series typically denotes a compact, forged body design for maximum strength and reliability under extreme pressure.

Key Specifications & Code Breakdown

• KHB: Likely the series/model code, indicating a specific design (forged body, specific seal package).

• NPT1: Connection Type – NPT (National Pipe Taper) thread. The “1” commonly refers to a female (F) port thread on both ends. This is the standard connection for North American fluid power systems.

• 315BAR: Maximum Working Pressure – 315 Bar (approximately 4,570 PSI). This high rating makes it suitable for heavy-duty hydraulic systems in construction, mining, agriculture, and industrial machinery.

• DN25: Nominal Diameter – 25mm, which corresponds to a 1 inch NPT connection. This indicates the nominal flow path size.

Key Features & Design

1. Forged Body Construction: Typically made from high-tensile carbon steel, providing exceptional strength and resistance to pressure surges and mechanical shock.

2. Ball Valve Mechanism: A chrome-plated or stainless steel ball with a precision mirror finish ensures smooth operation and a reliable, low-torque seal. The quarter-turn (90-degree) operation allows for quick and easy open/close control.

3. High-Pressure Seals: Utilizes advanced seal materials (such as Polyurethane, NBR, or other engineered polymers) compatible with a wide range of hydraulic fluids (mineral oil, HFA/HFB, water-glycol) and resistant to high pressure and extrusion.

4. Robust Stem & Seal Design: Features a blow-out-proof stem to prevent stem ejection under pressure. Multiple stem seals ensure long-term leak-free performance.

5. Handle/Actuator: Equipped with a color-coded (often red) locking handle. The handle can be locked in the OPEN or CLOSED position with a padlock for safety (Lockout/Tagout – LOTO procedures).

6. Compact Design: Designed for easy installation in tight spaces within machine manifolds or line layouts.

7. Surface Treatment: Body is usually phosphate-coated and painted for corrosion resistance. Active parts may be zinc or chrome-plated.

Typical Applications

• Isolation valves on hydraulic cylinders, pumps, motors, and accumulators.

• Manifold and valve bank isolation.

• Maintenance shut-off points in mobile equipment (excavators, loaders, cranes).

• Industrial hydraulic power units (HPUs) and test stands.

• Any application requiring a reliable, high-pressure, positive shut-off valve.