Lockshield valve insert Purmo CABLOK15 for radiator valve DN15 (TU4) – replacement insert

Replacement lockshield insert Purmo CABLOK15 is designed for radiator valves with a nominal diameter of DN15 and TU4 connection. The insert functions as a flow limiter and locking element, allowing installers and service technicians to set, reduce or block the flow through a radiator valve during adjustment, balancing or maintenance operations. Intended as a compatible spare part for Purmo radiator valve assemblies that require DN15/TU4 type inserts.

Advantages

The insert provides a compact and serviceable solution for controlling flow in DN15 radiator valves without replacing the entire valve body. Manufactured to match Purmo valve geometry, the component allows precise flow limitation and reliable locking to maintain set throughput. Its design supports straightforward replacement during repairs and reduces downtime by enabling targeted intervention at the valve insert level.

Suitable for

• Repair or replacement of lockshield/flow limiter inserts in radiator valves with DN15/TU4 connections
• Balancing and commissioning of heating systems where flow limiting or locking is required
• Maintenance tasks that require limiting or blocking radiator flow without removing the valve body

Key specifications

• Compatibility: designed for radiator valves with nominal diameter DN15 and TU4 connection type
• Function: lockshield / flow limiter insert for setting, limiting or blocking flow
• Form factor: compact insert suitable for in-line replacement in compatible valve bodies
• Intended use: spare part for repair and maintenance of radiator valve assemblies

How to use

To replace the insert, isolate the radiator and release pressure from the system if necessary. Remove the retaining cap or closure from the valve body to access the existing insert, extract the old insert using appropriate tools, and install the new Purmo CABLOK15 insert in the same orientation. Reinstall the cap or closure and restore system pressure. After installation, check for leaks and verify the desired flow limitation or locking position by adjusting the valve actuator or handwheel as required.

Usage recommendations

Use this insert only in compatible DN15/TU4 Purmo valve assemblies. During replacement, follow standard safety procedures for working on heating systems: isolate and depressurize the circuit, wear appropriate protective equipment, and perform a pressure and leak test after reassembly. If uncertain about compatibility or installation steps, consult product documentation or a qualified heating technician.