KHB High Pressure Ball Valve | SAE J518C Hydraulic Shut-off Valve

Internal thread

KHB(BKH)

External thread

KHM

JB987-77 External thread seal

ISO 228 Internal thread

ANSI B1.20.1 NPT Internal thread

SAEJ514 UN/UNF Internal thread

1. Bidirectional Sealing & Material Optimization – Solving “Leakage” and “Fluid Incompatibility” Issues

“In high-pressure hydraulic systems, installation errors and fluid contamination are leading causes of valve failure. Our KHB series eliminates this risk with a bidirectional sealing design, allowing for flexible piping layouts without worrying about flow direction. More critically, we utilize a dual-material sealing strategy (POM core for wear resistance + NBR dynamic seal for broad chemical compatibility). This ensures stable performance whether you are using standard hydraulic oils, lubricants, or water-glycol fire-resistant fluids—reducing unplanned downtime caused by seal degradation. ”

2. Ultra-High Pressure Endurance & Energy Efficiency – Maximizing System Output

“While standard valves struggle under 350 bar, the KHB series is engineered for 500 bar burst-resistant operations, specifically tailored for heavy-duty construction and mining equipment. But pressure isn’t the whole story. Our full-flow, unobstructed bore design ensures the valve’s inner diameter matches your pipe ID, resulting in negligible pressure drop. This directly translates to lower pump energy consumption and reduced heat generation in your closed-loop systems. Additionally, the anti-cavitation structure protects downstream actuators from sudden pressure shocks, extending the lifespan of your entire hydraulic circuit.”

3. Robust Construction & Tool-Free Installation – Lowering Total Cost of Ownership (TCO)

“Industrial environments demand more than just sealing; they demand survival. The KHB features a full carbon steel body with a galvanized coating, offering superior resistance to humidity and mild corrosive atmospheres without the premium cost of stainless steel. For maintenance teams, the SAE J518C Code 61 standardized flange interface guarantees a perfect, leak-free fit with existing Parker, HYDAC, or Sunfab connections. This standardized design allows for quick drop-in replacements without modifying your existing pipework, drastically shortening equipment downtime during maintenance shifts.”

KHB Series vs. Competitors (Technical Benchmark)

The KHB series valves, with their outstanding pressure resistance, reliable sealing performance and long service life design, maintain stable performance even under harsh conditions. Therefore, they are widely used in multiple high-demand industrial fields. Here are their core application scenarios:

Construction machinery and agricultural equipment : Hydraulic control systems suitable for excavators, loaders, and tractors, ensuring precise movements and quick responses, thereby enhancing operational efficiency.

Mining machinery: Specifically designed for the high-pressure hydraulic systems of rock drilling rigs, hydraulic supports, and mining dump trucks, it can withstand impact loads and dusty environments, ensuring a continuous and stable supply of hydraulic fluid.

Energy and Gas Transmission:In gas compression units, long-distance pipelines, and pressure regulating and metering stations, as key switching components for instrument control and process pipelines, they meet the requirements of high pressure, explosion prevention, and long-term operation.

Industrial hydraulic power station : A high-pressure power unit widely used in various manufacturing workshops, for direction control, pressure switching and safety cutoff, simplifying system integration and reducing maintenance costs.

No matter which industry you are in, the KHB series valves can provide a reliable core control solution for your hydraulic system with their outstanding performance of high flow coefficient and low pressure loss.

Q1: What is an SAE J518C flange interface?
A1: The SAE J518C flange interface is an internationally accepted four-bolt flange connection design for hydraulics. A hydraulic ball valve with SAE J518C connection can be directly mounted on pipelines and hydraulic equipments of the same interface without the need of custom-made adapters. This normalized connection enables a tight sealing, a high mechanical resistance and a better interchangability, allowing easier assembly and maintenance.

Q2: Why does this hydraulic ball valve use both POM and NBR seals?
A2: Various seal materials are employed, each having a unique function. The primary ball seat was made of POM (Polyoxymethylene) on account of its superior wear resistance, high strength, and good dimensional stability in high-pressure working condition. NBR (Nitrile Rubber) is used for the valve stem and connection seals for excellent elasticity and resistance to hydraulic oil. The use of POM and NBR guarantees smooth valve operation and the lowest risk of leakage even after long-term use.

Q3: Can this hydraulic ball valve be used for natural gas?
A3: Yes, this hydraulic ball valve is applicable for natural gas under appropriate operating condition. But please consult with our technical team before choosing the valve for natural gas or other flammable gases. For your information, application-related further material compatibility checking and/or optional fire-safe execution might be necessary for safe operation, meeting regulatory requirements and long term sealing performance.

Q4: Is the SAE J518C interface compatible with other hydraulic systems?
A4: Yes. The SAE J518C is a global standard for industrial and mobile hydraulics. If your hydraulic component uses the SAE J518C flange standard, then this valve can usually be installed as is, saving on installation time without compromising the integrity of the connection or causing leaks.

The KHB Series is a high pressure ball valve design that meets the challenges of high pressure fluid control applications with proven KHB Series performance. The sealing material solutions available according to your operating media, pressure demands, temperature conditions and other application related requirements are not limited to our standard product range only but also customised solutions. Hydraulic oil, specialty chemicals, or just about any industrial fluid your system processes, our engineering team can assist you in determining the best sealing solution.

If you want a reliable high pressure hydraulic ball valve, contact us today for the datasheets, product catalogs, quotations or if you require any assistance in selecting products. With professional support and responsive service, we endeavour to help you get the best valve solution for your hydraulic system.