SAE flange end ball valves to ISO 6162, 1/2" to 3"

They are the two SAE flange patterns. ISO 6162‑1 is the 3000 psi interface (SAE Code 61) and ISO 6162‑2 the 6000 psi one (Code 62). They share a nominal size but not a bolt spacing, so a valve on the wrong pattern will not bolt to your port. In this family both patterns are available up to 2"; above that, only 6162‑1.

Two numbers apply and you need both. The valve body has its own PN — 350 bar at DN13 and DN20 on the 6162‑1 pattern, 420 bar on 6162‑2, and 315 bar at DN25 in either. The flange interface is rated by its class, roughly 210 bar for 6162‑1 and 420 bar for 6162‑2. The joint is limited by whichever is lower, which is usually the flange. MHA prints the warning on every sheet: note the pressure ratings of the connection flanges.

The BKHP‑DN25‑SAE420, not the BKH. The standard BKH body drops to 315 bar at DN25 in both flange patterns; the BKHP is a different, slightly longer body and it is the only one in the range that holds the full 420 bar at that bore. Asking for “a 1" 420 bar SAE ball valve” and being sent a BKH is a real and common error.

DN13 to DN80, which is 1/2" to 3", across three bodies: BKH/BKHP at DN13–DN25, MKHP at DN32–DN50 and KH at DN15–DN80 — so KH overlaps the other two and offers a shorter, full‑port alternative at the small bores. Note that the threaded BKH valves go smaller than this, but the SAE flange end versions start at DN13.

Both patterns run through the range, but availability is per part, not per size — some parts are built for one pattern and some carry both, which is why a KH‑DN15 is marked SAE210/420. At 3" (DN80), the top of the range, send us the drawing and we will confirm which pattern is actually built at that bore rather than have you design around an assumption. It is also the size where the flange interface, not the valve body, is almost always the limiting element.

It specifies five parts at once — body, ball, stem, ball seats and O‑rings. 112A is steel throughout with NBR seals; 442A is SS316 with NBR; 282A is the KH code, steel with a duplex stem. Each has an alternative combination with FPM (Viton®) instead of nitrile. Ball seats are POM in every case. The elastomer is the part that matters most and the part you cannot see once the valve is together.

NBR for mineral hydraulic oil, which is most jobs, and it is the cheaper seal. FPM when the temperature is higher than nitrile takes or the medium is a fuel, a solvent or an aggressive chemical. FPM is not simply the better seal — it stiffens at low temperature sooner than NBR. Tell us the medium and the peak temperature and we will pick it.

No. A ball valve is an isolation device: open or shut. Held part‑open, the flow is forced through a narrow crescent between ball and seat and the velocity wire‑draws the seat, cutting a channel across the sealing face. After that the valve weeps in the closed position for the rest of its life. If the job needs regulation, use a needle valve and let the ball valve isolate it.

On the KH range MHA states it explicitly: the lever must be fixed centrally during operation, because in the presence of vibration the handle can otherwise operate the valve by itself. On a large‑bore isolator that is a valve changing state without anyone touching it. Where vibration is a factor, ask about the locking devices and detent options on that range.

Both are catalogue options, and they are not interchangeable. The smaller sizes come in M8, M10 and M12 metric or 5/16", 3/8" and 7/16" UNC. It depends on the port you are bolting to, so it belongs on the enquiry — a valve with the wrong bolt thread is a valve you cannot fit.

Yes, and this is the commonest short‑order on this product. The valve presents a flat face at each end. The mating half — the SAE flange, O‑ring side, which carries the seal in its groove — is a separate part, as are the screws, washers and O‑rings. A complete joint pair is five items; see what a complete joint needs. We quote the full set unless you tell us you already hold the flanges.

Usually not. MHA’s own drawings carry the note “normally lever will be delivered unassembled”, so expect to fit it on site. That matters twice over: check the lever is in the box before the fitter travels, and once fitted make sure it is secured centrally — on the KH range MHA warns that vibration can otherwise let the handle work the valve by itself.

It depends on the body and the material code, and the spread is wider than people expect. BKH and MKHP: −20 °C to +100 °C. KH: −10 °C to +100 °C — the narrowest of the three at the cold end. The 442A stainless combination is rated −30 °C to +100 °C. If the plant cold‑starts outdoors, the cold figure is the one to check, not the hot one.

The KH body is a full port design — the bore through the ball matches the line, so there is no step to throttle the flow, which is part of why its Kv figures are what they are. If full bore is a requirement rather than a preference, say so and we will confirm it against the specific part number, because it is not a safe assumption across every body and every bore.

Yes — on the KH range these are catalogue options rather than specials: locking devices, actuators, mounting holes, position switches, detent and combinations of them. If the valve has to be padlocked in one position, driven, or position‑sensed for an interlock, say so with the enquiry. Retrofitting a mounting pattern to a valve already on the shelf is usually not possible.

They describe the same thing in different units, so use whichever your calculation is in. Cv is US gallons per minute of water at 15 °C for a 1 psi drop; Kv is m³/h of water between 5 and 40 °C for a 1 bar drop. Convert with Kv = Cv ÷ 1.156. Both are in the flow table. If flow rate rather than pressure is the binding constraint, size on Kv and work back to the bore.