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  • LK Armatur

    LK Armatur is a leading producer in Europe, manufactures millions of valves per year for the global HVAC market. Our solutions are based on a comprehensive view of how valves, control units, components and prefabricated products work together. Svenska English Deutsch Italiano Yкраїнська Suomi

  • LK Systems

    LK Systems is the leading manufacturer of easy-to-install systems for heating and tap water distribution and pre-insulated pipes in the Nordics. Through our prefabrication factory, we also provide tailor-made solutions that simplify the installation process even further. Svenska English Norsk Suomi

  • LK Pex

    Our PEX Pipe Extrusion business area is an innovative manufacturer of high-quality plastic pipes for the heating and plumbing industry. Our core is the efficient, high-technology production process for crosslinked PE-Xa pipes, resulting in products with a unique combination of flexibility and hydrostatic strength. English

  • LK Group

    LK is a family-owned trading and production group, operating on a global scale within the HVAC-area. We are the market leader in Sweden and has an increasing sales of products, systems and solutions in the Nordic countries, Europe and the USA. Svenska English
LK 514 MultiSafe

LK 514 MultiSafe

  • O-ring connection suitable for LK’s range of valves
  • From 1.5 to 10 bar
  • Protect your boiler against overpressure

LK 514 MultiSafe is a high lift, soft sealing safety relief valve for tap water installations as well as heating, recycling and cooling systems with thermal expansion only. The valve must not be used for steam....

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LK 514 MultiSafe

  • Variants
  • Detailed Information
  • Documentation
  • Questions & Answers

Variants

LK 514 Male thread / Compression fitting

LK 514 Male thread / Compression fitting 8 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
090109 M ½" x 15 mm 0,15 MPa 3420 l/h 0.1
090110 M ½" x 15 mm 0,25 MPa 4159 l/h 0.1
090111 M ½" x 15 mm 0,3 MPa 4484 l/h 0.1
090112 M ½" x 15 mm 0,4 MPa 5180 l/h 0.1
090113 M ½" x 15 mm 0,6 MPa 6350 l/h 0.1
090114 M ½" x 15 mm 0,7 MPa 6860 l/h 0.1
090115 M ½" x 15 mm 0,9 MPa 7782 l/h 0.1
090116 M ½" x 15 mm 1,0 MPa 8204 l/h 0.1

090109

Dim. M ½" x 15 mm
Opening pressure 0,15 MPa
Discharge capacity 3420 l/h
Weight (kg) 0.1
Item list

090110

Dim. M ½" x 15 mm
Opening pressure 0,25 MPa
Discharge capacity 4159 l/h
Weight (kg) 0.1
Item list

090111

Dim. M ½" x 15 mm
Opening pressure 0,3 MPa
Discharge capacity 4484 l/h
Weight (kg) 0.1
Item list

090112

Dim. M ½" x 15 mm
Opening pressure 0,4 MPa
Discharge capacity 5180 l/h
Weight (kg) 0.1
Item list

090113

Dim. M ½" x 15 mm
Opening pressure 0,6 MPa
Discharge capacity 6350 l/h
Weight (kg) 0.1
Item list

090114

Dim. M ½" x 15 mm
Opening pressure 0,7 MPa
Discharge capacity 6860 l/h
Weight (kg) 0.1
Item list

090115

Dim. M ½" x 15 mm
Opening pressure 0,9 MPa
Discharge capacity 7782 l/h
Weight (kg) 0.1
Item list

090116

Dim. M ½" x 15 mm
Opening pressure 1,0 MPa
Discharge capacity 8204 l/h
Weight (kg) 0.1
Item list

*(According to EN 1491)

Detailed Information

Description

LK 514 MultiSafe is a high lift, soft sealing safety relief valve for tap water installations as well as heating, recycling and cooling systems with thermal expansion only. The valve must not be used for steam. The outlet is fitted with compression fitting for simple installation of a discharge pipe.

Turn the knob counter-clockwise ¼ turn until a faint “click” is heard. Let the water flush through briefly, then turn another ¼ turn until a stronger “click” is heard and the valve closes.

This two-step opening function makes it possible to use the safety valve discharge pipe to drain e.g. a water heater.

The safety relief valve can be installed horizontally or vertically, i.e. with the valve knob facing outwards or upwards. In horizontal installations, the outlet must be positioned so that water pockets cannot be formed.

The male thread is designed for the LK Armatur system with O-ring seal where the valve is first tightened by hand until stop and then with a spanner, 0.5-1.5 turns until the desired position is achieved. If the valve is fitted to other components than an LKA valve, the thread has to be sealed in the usual manner.

The safety relief valve requires no maintenance but the opening function should be checked 2-3 times per year.

It is normal for the safety relief valve to open and let out some water when the pressure level of the system is reached due to the water’s increasing volume during heating.

Technical Data

Working temperature: Min. -10 °C/Max. 110 °C
Thread standard: G - male thread
Material, valve body: DZR Brass EN 12165 CW625N
Material, sealing: EPDM
Type approval certificate: CE

Documentation

Product sheet

LK 514 MultiSafe

Instruction manual

048181_LK 514-Instruction

Certificate/Type approval

EU Declaration of Conformity - 510, 511, 512,514.pdf

Applications

Biofuel ENG

Applications

Solar heating ENG

Applications

Water heating ENG

Applications

District heating ENG

Applications

Heat pump ENG

Questions & Answers

Why is my safety valve leaking?

About leaking safety valves  

A safety valve has two tasks;  

1.      It should serve as an emergency protection device if the electrical limiters stop working.  

2.      It should continuously release the expansion that occurs when the water heats up.  

The constant "dripping" might lead one to believe that the valve is faulty. But it is not faulty as the valve is supposed to release water.  

How much water passes through the valve depends on how often and how much hot water is used. 

Example:
When heating from 10 to 70°C, the water expands by approximately 3%.  So 9 litres must flow through the valve when heating an 800-litre water heater.  This means that an overflow pipe must be installed, and the pipe, which can be 2 metres long at most, must not be routed upwards.  

The fact that some older safety valves did not release any water only confirms that the non-return valve in those systems was faulty and allowed the expansion to flow back into the pipes.  

A safety valve that releases some water confirms that all valves are in working order.  

9 September 2024

Can you use LK's safety valves with steam?

None of LK's safety valves are designed to be used with steam.

11 October 2022