3-way Thermostatic Mixing Valve Sourcing R157A D25 60°C Kvs 3.2

The 3-way Thermostatic Mixing Valve Sourcing R157A D25 60°C Kvs 3.2 is a mechanical thermostatic valve designed to blend hot and cold water and deliver a stable fixed outlet temperature of 60°C. Built for use in domestic hot water systems, heating circuits and safety mixing for showers or taps, this valve provides automatic temperature control without the need for electrical power or electronic controllers. The compact D25 body and Kvs 3.2 flow coefficient enable predictable flow behavior and straightforward integration into existing plumbing installations.

Advantages

This thermostatic mixing valve offers consistent temperature regulation at a fixed 60°C setpoint, reducing the risk of scalding and ensuring predictable supply temperature for downstream fixtures. Its mechanical operation provides reliable performance in environments where electrical control is impractical or undesirable. The Kvs 3.2 rating supports moderate flow rates typical for domestic and light commercial applications, while the 3-way design allows safe diversion or mixing arrangements depending on system configuration.

Suitable for

• Domestic hot water systems requiring a stable 60°C supply
• Heating circuits where a fixed blending temperature is needed
• Safety mixing for showers, taps or sanitary outlets to limit scalding
• Installation where mechanical, non-electrical temperature control is preferred

When it may not be suitable

The valve is designed with a fixed 60°C setpoint and therefore is not suitable where adjustable outlet temperature is required. Systems that demand variable temperature control, precise electronic modulation, or integration with a building management system will require a different thermostatic or electronically controlled mixing device. Additionally, for very high flow-rate applications beyond the capacity implied by Kvs 3.2, a larger valve or multiple parallel valves should be considered.

Key specifications

• Function: 3-way thermostatic mixing valve (hot/cold blend)
• Body size: D25 (nominal 25 mm connection)
• Fixed outlet temperature: 60°C
• Kvs (flow coefficient): 3.2
• Operation: Mechanical thermostatic control, no electrical power required
• Typical applications: domestic hot water, heating circuits, safety mixing for sanitary outlets

How to use

Install the valve in accordance with local plumbing codes and the system schematic so that the hot and cold inlets are connected to their respective supply lines and the mixed outlet feeds the downstream fixtures. Ensure correct pipe orientation and secure connections to avoid leaks. Flush the lines prior to commissioning to remove debris. After installation, verify the outlet temperature at the point of use to confirm the 60°C setpoint. Periodically inspect and maintain the valve according to the manufacturer's maintenance guidelines to ensure uninterrupted thermostatic performance.

What to consider before purchase

• Confirm the required outlet temperature is 60°C and fixed operation meets system needs
• Verify flow requirements against a Kvs 3.2 rating to ensure adequate capacity
• Check compatibility with pipe size D25 and connection type used in the installation
• Assess whether mechanical thermostatic control (no electronics) is acceptable for the application

Usage recommendations

For safe and reliable operation, fit the valve with appropriate commissioning checks: flush the system before installation, fit strainers if the supply contains particulates, and include shut-off valves for future servicing. If required by local regulations, combine the valve with secondary temperature-limiting or mixing devices as part of a comprehensive scald-prevention strategy.