Thermal Safety Valve

Thermal safety valves address a different protection requirement from conventional pressure safety valves: excess temperature. In heating systems, a thermal safety valve responds to a defined temperature rather than simply a pressure set point. Thermal Safety Valve Suppliers in Morocco can provide temperature-operated protection for water-based heating systems where overheating needs to be controlled without relying on electrical power.

How Thermal Safety Valves Work

A temperature sensor monitors the heat source or water temperature. When the preset response temperature is reached, the valve opens mechanically and allows cooling water to enter the cooling circuit or hot water to be discharged, depending on the system design. Once the temperature returns to the permissible range, the valve can close again.

Technical Specifications

Materials & Components

Main Materials

• Body: CW617N Brass / Nickel-Plated Brass

• Valve Internals: Brass / Stainless Steel

• Spring: Stainless Steel / Spring Steel

• Temperature Probe: Copper

• Capillary Tube: Copper

• Sensor Pocket: Brass / Nickel-Plated Brass

• Seals: EPDM / NBR

• Functional Components: Temperature-Resistant Polymer, depending on design

Commercial thermal safety designs commonly use brass bodies, copper temperature-sensing elements and EPDM/NBR sealing materials.

Applications in Morocco

Thermal safety valves are most relevant to closed heating systems, solid-fuel boilers, biomass heating installations and boiler systems incorporating a safety heat exchanger. Their function is to prevent excessive water temperature by introducing cooling water when the defined response temperature is reached.

For Morocco, this makes the product more relevant to commercial heating installations, institutional buildings, hotels and industrial heating systems using solid-fuel or biomass boilers, rather than presenting it as a general oil-and-gas safety valve.

Standards

EN 14597 covers temperature control and limiting devices for heat-producing systems, including thermal safety devices. These valves are commonly used with heating systems designed in accordance with EN 12828, where applicable. The exact certification and installation requirements depend on the heating system and selected valve design.