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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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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.
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 according to the following:
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.
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. -15 °C/Max. 90 °C (120 °C briefly) |
Thread standard: | G - male thread |
Material, valve body: | DZR Brass EN 12165 CW625N |
Material, sealing: | EPDM |
Approvals: | CE |
Product sheet
LK 514 MultiSafe
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
Water jacketed stove ENG
Applications
Heat pump ENG
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.
Can you use LK's safety valves with steam?
None of LK's safety valves are designed to be used with steam.