Schroeder – SMA Auto. Recirculation ValveEnquire Now

Schroeder 8211 SMA Auto Recirculation ValveSchroeder 8211 SMA Auto Recirculation Valve

BRAND: SchroederCATEGORY: Pump Protection Valves

Schroeder Automatic Recirculation (ARC) Valves also known as Leak Off Valves automatically protect high pressure multi-stage centrifugal pumps against overheating, wear, cavitation to total loss and severe damage, which can occur during dry running or during low-load / low-flow operation. Should the flow through the pump fall below the required minimum as specified by the pump manufacturer the bypass system opens and the process liquid is recirculated providing the required minimum flow protection for the pump. Schroeder valves have historically proven to provide exceptional reliability and low pressure loss over time. They are not susceptible to interference and require very low maintenance. In addition this purely mechanical device does not require external power or any kind of control unit, thus ensuring low operating costs and low Total Cost of Ownership (TCO). Eskom, Sasol, Sulzer, KSB, Weir, Flowserve and many others rely on Schroeder to protect their multi-stage boiler feedwater and process pumps.

Specifications

SeriesSMA
Design

Pump Protection Minimum Flow Valve / Automatic Recirculation ARC Valve

Features
  • Max DP >180bar to 450bar
  • Self acting – controlled by medium (no external power)
  • Built in check valve
  • No special maintenance
Size
Range

80mm to 250mm / 3” to 10”

Pressure
Rating

PN 250 – 400 / ANSI 1500 – 2500

Temperatures-250°C to 400°C
End
Connections
Flanged
Body
Materials

Carbon steel / Stainless Steel
Other materials on request

Disc
Materials
Forged stainless steel / Hardfaced / Stellited
Seat
Materials
Forged stainless steel / Hardfaced / Stellited
Options &
Accessories
  • PTFE / KALREZ seals to suit media
Applications

Protects multi stage centrifugal pumps during minimum flow conditions by preventing overheating, excessive noise, instability and cavitation

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