Product description
The Mark 50HP Series is an elongated spring housing that features a large spring for high pressure setpoints up to 450 psi. The Mark 50HP is used to regulate upstream pressure at a predetermined setpoint. The spring in the Mark 50HP holds the sliding gate seats in their normally closed position.Back Pressure Reducing Valve MK50HP
Size
(1/4" & 3/8" sizes use 1/2" body with reducers)
• 1/4" through 4" (DN8 through DN100)
Cv (Kv)
- Dependent on construction
Diaphragm
- Jorlon - Standard
- Stainless Steel - Standard
- Buna-N - Standard
- Viton - Optional
Trim Materials
- 303SST — Standard on Ductile Iron, Bronze, Carbon Steel valves
- 316SST — Standard on Stainless Steel valves
- Monel, Hastelloy and other Alloys available
Body Materials
- Ductile Iron
- Bronze (1/2" - 2", DN15-DN50)
- Cast Iron (2-1/2" - 4", DN65-DN100
- Carbon Steel (A216 WCB)
- Stainless Steel (A351/CF8M)
End Connections
- Threaded – FNPT, BSPT, BSPP (1/4” – 2” only, DN8-DN50)
- ANSI Flanges (150#, 300#, 600#)
- DIN Flanges (PN10/16, PN25/40)
- JIS Flanges (upon request)
Features and Benefits
- Sliding Gate Trim – unique seat design for unsurpassed trim life and accuracy
- Jorcote Seat Coating – ceramic composite for liquids, gases and especially steam. Very low friction with outstanding wear resistance and a temperature rating of up to 550°F. Steam tested to 1,000,000 cycles and still maintained Class IV leakage.
- Jorlon Diaphragm – extremely durable, virtually universally applicable up to 450°F. Tested without failure to over 1,000,000 full stroke cycles. Ideal for steam, gases and liquids. 316SST diaphragm applicable up to 550°F.
- Straight-Thru Flow – the flow is straight through the valve seats and body. Direction of the disc travel is perpendicular to the flow, not opposed to the direction of the flow. Thus, the flow does not unbalance the seats. The MK60 can use a wider range of its stroke to give accurate control; less offset.
- Quiet Operation – typically 5-10 dB less than conventional globe style regulators. The disc and plate are always in contact, which eliminates chattering. Straight-through flow minimizes turbulence. Multiple orifices in the plate and disc divide the flow stream into smaller flow components.
- Minimum maintenance – the MK50HP sliding gate seats require no special tools for disassembly. The seats are pre-lapped at the factory and are self-lapping while in operation ensuring a continual tight shutoff.
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