MHA Zentgraf / MHA High Pressure Ball Valves

High pressure two-way and multi-way ball valves, accumulator safety blocks and check valves by MHA Zentgraf / MHA: technical selection for hydraulic systems.

MHA Zentgraf / MHA: two-way ball valves BKH and BK3

Block-type high pressure ball valves by MHA Zentgraf (MHA) series BKH and BK3 operate at pressures up to 500 bar. Carbon and stainless steel bodies feature BSPP, NPT and metric thread connections ensuring reliable shut-off for hydraulic mineral oils and synthetic fluids.

Compact block body construction with corrosion-resistant surface protection
Wear-resistant polyacetal POM ball seats combined with resilient FKM seals
Nominal bore sizes ranging from DN04 to DN50 for high-pressure fluid circuits
Smooth manual lever operation with integrated travel stops for open and close

MHA Zentgraf / MHA: manifold mounting ball valves MKH

Manifold mounting ball valves by MHA Zentgraf (MHA) series MKH and MKHP integrate directly onto hydraulic manifolds and subplates. Engineered for pressures up to 420 bar, these units eliminate external piping and prevent fluid leakages within compact power units.

Subplate mounting pattern compliant with standardized hydraulic block ports
Bottom or side connection ports designed for seamless manifold integration
Blowout-proof stem design with precision seals for prolonged operational life
Mounting interface for optional position indicators and pneumatic actuators

MHA Zentgraf / MHA: multi-way directional ball valves BK3 and 4KH

Multi-way ball valves by MHA Zentgraf (MHA) series BK3, 3KH and 4KH route and divert pressurized fluid flows up to 400 bar. L-bore and T-bore ball configurations allow multiple port switching schemes for hydraulic circuits in mobile machines and industrial presses.

Available with positive-switching L-bore and versatile T-bore ball designs
Pressure-balanced internal design preventing hydraulic shocks during shifting
High flow coefficient geometry minimizing internal fluid resistance and drop
Clear directional indicator plate on the handle for reliable port selection

MHA Zentgraf / MHA: flow control and check valves NDV and RV

Flow control and check valves by MHA Zentgraf (MHA) series NDV, NDRV and RV operate up to 350 bar. They provide precise metering of hydraulic flow rates to regulate cylinder speeds, while check valves deliver instantaneous zero-leakage fluid backflow prevention.

Fine adjustment micrometer scale on throttle knob with secure locking screw
Spring-loaded poppet check valve mechanism ensuring rapid droplet-tight seat
Configurable cracking pressures from 0.2 to 5 bar for tailored system setup
In-line threaded ports and cavity cartridge options for manifold integration

MHA Zentgraf / MHA: accumulator safety blocks ASB and SAF

Accumulator safety blocks by MHA Zentgraf (MHA) series ASB and SAF combine an isolating ball valve, manual drain needle valve and pressure relief valve port in one body. These safety modules protect hydraulic accumulators against overpressure hazards during operation.

Integrated mounting port for direct-acting safety pressure relief valve
Manual needle drain valve for pressure depressurization prior to servicing
Adaptation flanges and fittings for bladder, piston and diaphragm vessels
Optional solenoid-operated unloading valve for automated circuit release

MHA Zentgraf / MHA: hydrogen ball valves HFKH and DSB

Dedicated ball valves and spindle valves by MHA Zentgraf (MHA) series HFKH500, HFKH650 and HFKH1000 are engineered for hydrogen fueling stations and process gas piping. Reinforced stem sealing and specialized alloys withstand working pressures up to 1000 bar without H2 leakage.

Polymer ball seats engineered to prevent hydrogen embrittlement and wear
Dual stem sealing barrier preventing fugitive emissions of gaseous media
Heavy-duty architecture built in accordance with Fire-Safe design norms
Rated for operating pressures reaching 1000 bar in fueling dispensers

MHA Zentgraf hydraulic valves: manufacturing foundation and standards

German manufacturer MHA ZENTGRAF GmbH & Co. KG with production facilities in Merzig has developed and manufactured high-pressure shut-off and fluid control valves since 1945.

The company specializes in producing block-type two-way, three-way and multi-way ball valves, flow control throttles and accumulator safety blocks for demanding industrial duties.

Valves engineered by MHA Zentgraf (MHA) are widely utilized across heavy mechanical engineering, metallurgical rolling mills, mobile construction machinery, offshore platforms and power generation facilities.

Precision machining of housings and ball elements ensures reliable bubble-tight shut-off under continuous working pressures up to 500–800 bar.

Structural features and material executions of MHA ball valves

The architecture of MHA Zentgraf ball valves is based on massive forged carbon steel blocks or 1.4571 stainless steel alloys, eliminating internal microporosity and ensuring high resistance to pressure pulsations.

Ball seats are machined from wear-resistant polyacetal POM, modified PEEK or PTFE, providing low operating torque and chemical resistance to aggressive hydraulic fluids.

Stem seals feature fluoroelastomer FKM or nitrile NBR with backup rings to prevent extrusion under elevated pressures. For low-temperature environments and aggressive media, specialized executions are supplied with low-temperature elastomers preserving flexibility during sub-zero operations.

Identification and selection of MHA Zentgraf valves by nameplate

Precise identification of required valves or seal kits for MHA Zentgraf / MHA requires factory nameplate data: body size designation (such as BKH-DN16-16S or MKHP-DN25), manufacturer order code and connection thread specification.

When nameplates are missing, engineering selection proceeds via envelope dimensions, nominal bore and port configurations.

Our technical team verifies compatibility with BSPP (ISO 228), metric DIN 2353/ISO 8434-1, NPT (ANSI B1.20.1) threads, as well as SAE J518 (ISO 6162-1/2) flanged connections. This prevents dimensional discrepancies during valve integration into equipment lines and hydraulic power unit manifolds.

Installation, maintenance and scheduled seal replacement procedures

During ongoing hydraulic valve operation, polymeric ball seats and rotary stem seals experience mechanical wear.

When internal fluid bypass or external weeping around the stem appears, scheduled replacement of seal sets restores integrity without requiring complete dismantling of surrounding piping systems.

When installing BKH and MKH valves, alignment of connecting fluid lines and specified bolt tightening torques must be maintained to avoid introducing excessive bending stresses into the valve body.

For subplate valves, mounting face flatness and O-ring groove cleanliness are inspected before fitting fresh elastomeric seals.

Specialized engineering: hydrogen series and safety shut-off blocks

Addressing the technical demands of alternative energy, MHA Zentgraf developed the specialized HFKH valve line for compressed hydrogen up to 1000 bar. These units incorporate blowout-proof stems and polymer seats resistant to hydrogen embrittlement and rapid gas decompression phenomena.

To safeguard hydraulic accumulators, the manufacturer produces compact safety blocks series ASB.

The unit integrates an isolating ball valve, manual needle drain valve for depressurization prior to servicing, and a port for direct-acting relief valves, preventing catastrophic overpressurization during pressure spikes.

Component supply and technical support for industrial facilities

We support procurement of MHA Zentgraf (MHA) hydraulic valves and replacement parts for metallurgical works, mining facilities, machine tool builders and fluid power systems.

Technical assistance includes sizing recommendations and interchange verification for legacy valve assemblies while preserving original installation geometry.

International commercial terms, transparent quotations and comprehensive technical data sheets accompany each order. Deliveries to production sites and regional logistics centers are arranged through reputable freight forwarders with complete shipping documentation.

MHA Zentgraf / MHA and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of MHA Zentgraf / MHA and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.