Industrial Valves
SCHROEDAHL MRK
“Very high pressure applications”
The MRK is a heavy-duty automatic recirculation valve (ARV) designed specifically for very high-pressure centrifugal pumps. It is used where extreme differential pressures occur and where maximum operational safety, reliability, and cavitation-free pressure reduction are critical. The MRK valve combines:
Main line check valve, Flow-sensitive control system, Multi-stage bypass pressure reduction into a single, self-operated unit, eliminating the need for external control valves, actuators, or instrumentation.
Key Features:
- Designed for extreme high-pressure services
- Multi-stage pressure reduction for cavitation-free operation
- Robust forged body for maximum strength
- Integrated check valve prevents reverse flow
- Automatically modulating bypass
- No external energy or control system required
- Very low wear despite severe operating conditions
Technical specifications:
Nominal diameter
DN 80–300 / NPS 3–12
Pressure class
PN 250–640 / Class 1500–4500
Temperature (max.)
Up to 230 °C / 446 °F (other temperatures on request)
Housing material
1.0460 / A105, 1.0571 / LF2, 1.4404 / F316L, 1.4462 / F51, 1.4501 / F55
Housing type
Forged
Media
Liquids of all kinds (water, oils, chemicals, and others)
Flanges
EN 1092-1, ASME B16.5, ISO 7005, JIS, JPI, welding ends on request
Designs
Vertical installation, horizontal installation, manual start-up,enlarged nominal width of the bypass
Number of stages (max.)
10
Number of controlled stages
10
Operating range (max.)
Delta p up to max. 500 bar
Other
Bypass differential pressure up to 500 bar