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  • 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 510/511/512 MultiSafe
LK 510/511/512 MultiSafe
LK 510/511/512 MultiSafe

LK 510/511/512 MultiSafe

  • From 1.5 to 10 bar
  • Protect your boiler against overpressure

LK 510/511/512 MultiSafe is a safety relief valve for tap water installations, as well as heating systems with closed boiler system with a power of max.50 kW. The valve must not be used for steam. The outlet is...

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LK 510/511/512 MultiSafe

  • Variants
  • Detailed Information
  • Documentation
  • Questions & Answers

Variants

LK 510 - Female thread / Compression fitting - Tap water

LK 510 - Female thread / Compression fitting - Tap water 2 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
090033 F ¾" x 22 mm 0,9 MPa 6741 l/h 0.2
090034 F ¾" x 22 mm 1,0 MPa 7107 l/h 0.2

090033

Dim. F ¾" x 22 mm
Opening pressure 0,9 MPa
Discharge capacity 6741 l/h
Weight (kg) 0.2
Item list

090034

Dim. F ¾" x 22 mm
Opening pressure 1,0 MPa
Discharge capacity 7107 l/h
Weight (kg) 0.2
Item list

According to EN 1491

LK 510 - Female thread / Compression fitting - Heating

LK 510 - Female thread / Compression fitting - Heating 4 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
090030 F ¾" x 22 mm 0,15 MPa 2962 l/h 0.2
090035 F ¾" x 22 mm 0,2 MPa 3298 l/h 0.2
090031 F ¾" x 22 mm 0,25 MPa 3602 l/h 0.2
090036 F ¾" x 22 mm 0,3 MPa 3883 l/h 0.2

090030

Dim. F ¾" x 22 mm
Opening pressure 0,15 MPa
Discharge capacity 2962 l/h
Weight (kg) 0.2
Item list

090035

Dim. F ¾" x 22 mm
Opening pressure 0,2 MPa
Discharge capacity 3298 l/h
Weight (kg) 0.2
Item list

090031

Dim. F ¾" x 22 mm
Opening pressure 0,25 MPa
Discharge capacity 3602 l/h
Weight (kg) 0.2
Item list

090036

Dim. F ¾" x 22 mm
Opening pressure 0,3 MPa
Discharge capacity 3883 l/h
Weight (kg) 0.2
Item list

According to EN 1491

LK 510 - Female thread - Heating

LK 510 - Female thread - Heating 2 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
055505 F ¾" 0,15 MPa 2962 l/h 0.2
055506 F ¾" 0,25 MPa 3602 l/h 0.2

055505

Dim. F ¾"
Opening pressure 0,15 MPa
Discharge capacity 2962 l/h
Weight (kg) 0.2
Item list

055506

Dim. F ¾"
Opening pressure 0,25 MPa
Discharge capacity 3602 l/h
Weight (kg) 0.2
Item list

According to EN 1491

LK 511 - Male thread / Compression fitting - Tap water

LK 511 - Male thread / Compression fitting - Tap water 2 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
090043 M ¾" x 22 mm 0,9 MPa 6741 l/h 0.2
090044 M ¾" x 22 mm 1,0 MPa 7107 l/h 0.2

090043

Dim. M ¾" x 22 mm
Opening pressure 0,9 MPa
Discharge capacity 6741 l/h
Weight (kg) 0.2
Item list

090044

Dim. M ¾" x 22 mm
Opening pressure 1,0 MPa
Discharge capacity 7107 l/h
Weight (kg) 0.2
Item list

According to EN 1491

LK 511 - Male thread / Compression fitting - Heating

LK 511 - Male thread / Compression fitting - Heating 4 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
090040 M ¾" x 22 mm 0,15 MPa 2962 l/h 0.2
090047 M ¾" x 22 mm 0,2 MPa 3298 l/h 0.2
090041 M ¾" x 22 mm 0,25 MPa 3602 l/h 0.2
090048 M ¾" x 22 mm 0,3 MPa 3883 l/h 0.2

090040

Dim. M ¾" x 22 mm
Opening pressure 0,15 MPa
Discharge capacity 2962 l/h
Weight (kg) 0.2
Item list

090047

Dim. M ¾" x 22 mm
Opening pressure 0,2 MPa
Discharge capacity 3298 l/h
Weight (kg) 0.2
Item list

090041

Dim. M ¾" x 22 mm
Opening pressure 0,25 MPa
Discharge capacity 3602 l/h
Weight (kg) 0.2
Item list

090048

Dim. M ¾" x 22 mm
Opening pressure 0,3 MPa
Discharge capacity 3883 l/h
Weight (kg) 0.2
Item list

According to EN 1491

LK 512 - Compression fitting - Tap water

LK 512 - Compression fitting - Tap water 2 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
090053 22 mm 0,9 MPa 6741 l/h 0.3
090054 22 mm 1,0 MPa 7107 l/h 0.3

090053

Dim. 22 mm
Opening pressure 0,9 MPa
Discharge capacity 6741 l/h
Weight (kg) 0.3
Item list

090054

Dim. 22 mm
Opening pressure 1,0 MPa
Discharge capacity 7107 l/h
Weight (kg) 0.3
Item list

According to EN 1491

LK 512 - Compression fitting - Heating

LK 512 - Compression fitting - Heating 2 variants

Article Dim. Opening pressure Discharge capacity Weight (kg) Item List
090050 22 mm 0,15 MPa 2962 l/h 0.3
090051 22 mm 0,25 MPa 3602 l/h 0.3

090050

Dim. 22 mm
Opening pressure 0,15 MPa
Discharge capacity 2962 l/h
Weight (kg) 0.3
Item list

090051

Dim. 22 mm
Opening pressure 0,25 MPa
Discharge capacity 3602 l/h
Weight (kg) 0.3
Item list

According to EN 1491

Detailed Information

Description

LK 510/511/512 MultiSafe is a safety relief valve for tap water installations, as well as heating systems with closed boiler system with a power of max.50 kW. The valve must not be used for steam. The outlet is fitted with compression fitting for simple installation of a discharge pipe.

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 a water pocket cannot be formed.
The thread has to be sealed in the usual manner.

It is easier to fit the compression fitting if a lubricant is applied to the thread and bevel. Tighten first by hand and then with a box spanner. Number of turns to be tightened with a spanner: See the separate datasheet for compression fittings. Soft pipes are to be fitted with a support sleeve.

The safety relief valve requires no maintenance. The opening function should, however, be checked 2-3 times a year.:

Turn the knob counterclockwise by hand, until water flows out. Let the water flush through for a moment. Then turn the knob until a click is heard, about ¼ turn, and the valve returns to closed position.

The safety relief valve may open after a large discharge from the water heater. This is a normal function since the pressure relief level in the water heater can be reached due to the increased volume of the water when heated.

Technical Data

Working temperature: Min. -10 °C/Max. 110 °C
Thread standard: G - male thread, G - female thread
Material, valve body: DZR Brass EN 12165 CW625N
Material, sealing: EPDM
Type approval certificate: CE - LK 511 and LK 512 are fitted with a CE-marked LK 510 valve with installed nipple.

Documentation

Product sheet

LK 510/511/512 MultiSafe

Certificate/Type approval

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

Instruction manual

048216_LK 510-Instruction

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