MHA Zentgraf — ball valves to 700 bar.
MHA Zentgraf GmbH & Co. KG builds high pressure ball, control and check valves in Germany. The BKH, MKH and KH series run to 700 bar, in threaded, compression and SAE flange end connections — and the range is built to be configured, not just ordered.
What we stock from MHA Zentgraf
Six lines, all high pressure.
BKH, MKH and KH ball valves
The core high pressure range to 700 bar. BKH is the quarter‑turn body; MKH and KH cover the other port and mounting arrangements.
Threaded BSPP or NPT, or compression ends.
Series, sizes and pressures →SAE flange end ball valves
The same BKH, MKH and KH bodies with an SAE flange connection, for bolting straight onto a manifold or pump port.
No adapters, and no thread sealing to get wrong.
SAE flange end valves →ISO 6164 ball valves
Four‑bolt ISO 6164 square flange pattern, the metric alternative to SAE where the circuit is specified to ISO.
ISO 6164 ball valves →High pressure check valves
One‑way flow at high pressure — protecting pumps and holding load where a circuit must not backfeed.
High pressure check valves →SAE flange check valves
Check function in an SAE flange body, so it mounts like the rest of the flanged run.
SAE flange check valves →Needle valves
Steel needle valves to 350 bar for throttling and fine flow control, where a ball valve is too coarse.
Needle valves →Specifying one
The body is the start of the order, not the end of it.
How it configures
MHA standard ball valves come in numerous designs and are meant to be built up. Commonly added:
- Limit switches — so the control system knows the valve position.
- Locking devices — to lock a valve open or shut for isolation and permit‑to‑work.
- Detent — a positive stop so the handle holds its setting.
- Additional assembly bores — extra mounting points for brackets and plates.
- Actuators — where the valve is operated remotely rather than by hand.
Tell us the duty and how it will be operated, and we will specify the body and the accessories together — that is usually cheaper than retrofitting a switch later.
Certification and inspection
- Tested and certified to the CE Pressure Equipment Directive.
- DIN EN ISO 9001 for quality management.
- DIN EN ISO 14001 for environmental management.
- Acceptance procedures are carried out under the supervision and inspection of the notable classification societies.
That last point is the one that matters on marine and offshore work — if a class surveyor has to witness or accept the valve, the manufacturer already works that way.
MHA hold roughly 30,000 ball, flow control and check valves with their accessories — so a high pressure valve in an unusual configuration is usually a lead time, not a redesign.
Where it gets used
- High pressure hydraulics — presses, test rigs and power packs running near 700 bar.
- Marine and offshore — where classification society acceptance is part of the handover.
- Control and throttling duty — MHA specialise in control, throttle and lock valves, not just isolation.
Send the pressure, the port arrangement and how it is operated.
MHA Zentgraf catalogues
Nine catalogues, free to download — no form.
MHA BKH High Pressure Ball ValvesPDF
MHA MKH High Pressure Ball ValvesPDF
MHA BKH SAE Flange End Ball ValvesPDF
MHA MKH SAE Flange End Ball ValvesPDF
MHA KH SAE Flange End Ball ValvesPDF
MHA ISO 6164 Ball ValvesPDF
MHA High Pressure Check ValvesPDF
MHA SAE Flange Check ValvesPDF
MHA Needle Valves Steel 350 BarPDF
Send the pressure, the port and the series.
One valve or a configured assembly — priced by a product specialist within two working hours.