GESTRA MK 35-31 / MK 35-32 Thermodynamic Steam Traps



GESTRA MK35‑31 & MK35‑32 Thermostatic Steam Traps
GESTRA MK35‑31 and MK35‑32 are compact, durable, and precision-engineered thermostatic steam traps designed for efficient condensate discharge in steam systems. Equipped with a stainless steel membrane regulator, these traps are ideal for applications such as steam lines, heat exchangers, and condensate collection systems.
Technical Specifications
Operating Principle: Thermostatic / Thermodynamic
Pressure Rating: PN 25
Sizes: DN 10 – DN 15 (⅜″ – ½″)
Connection Types:
MK35‑31: Tandem seat, threaded
MK35‑32: Single seat, flanged
Integrated strainer and non-return valve
Asbestos-free gasket (graphite/CrNi)
360° universal installation
Optional regulator capsules:
“N” type: Minimal subcooling (~10 K)
“U” type: Extended subcooling (~30 K), ideal for condensate recovery
Working Principle
At system start-up, the trap is fully open, allowing cold condensate and air to discharge rapidly. As the temperature rises and approaches saturation, the stainless steel membrane bends, moving the nozzle toward the closed position. The trap then reopens once the condensate temperature drops, enabling controlled discharge according to system demand.
Typical Applications
Steam distribution lines
Steam tracing systems
Heat exchangers
Process vessels
Equipment requiring fast and efficient condensate removal
Key Benefits
High resistance to pressure and temperature fluctuations
Waterhammer-resistant membrane structure
Compact, maintenance-friendly design
Precise opening/closing action
Optional undercooling for energy efficiency.