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Temperature safety relief valve
543 series
General description
Temperature safety relief valves are manufactured by Caleffi S.p.A. in
compliance with the essential requirements contained in Directive
97/23/EC of the European Parliament and of the Council of the
European Union to harmonise member state regulations on pressure
equipment.
Function
The temperature safety relief valves limit the temperature of water
in multi-fuel or solid fuel boilers with either a boiler incorporated or
an emergency heat exchanger.
When the temperature reaches 95°C, the valve starts to discharge
the necessary amount of water to keep the boiler temperature
within the safety limits.
Its use is specified by I.S.P.E.S.L. regulations (collection “R” - pub-
2005), it complies with EN 14597 and can be used on systems that
comply with EN 12828, relating to solid fuel boilers with a power
output of less than 100 kW.
Technical specification
Materials:
Body: brass EN 12165 CW617N, chrome plated
Control spindle: brass EN 12164 CW617N
Obturator seal: EPDM
Seals: EPDM
Spring: stainless steel
Protection cover: POM
Performance:
Max. working pressure: 10 bar
Set temperature: 95°C
Temperature range: 5–110°C
Discharge flow rate at 110°C and Δp 1 bar: 3000 l/h
Ambient temperature range: 0–80°C
Action type (EN 14597): 2 KP
Max. temperature of the sensor: 130°C
Medium: water
PED category: IV
Connections: 3/4” F x 3/4” F
Probe connection: 1/2” M
Capillary length: 1300 mm
Dimensions
CALEFF I
Product range
Code 543513 Temperature safety relief valve Size 3/4”
01057/07 GB
replaces dp 01057/05
R
E
G
I
S
T
E
R
E
D
BSI EN ISO 9001:2000
Cert. n° FM 21654
UNI EN ISO 9001:2000
Cert. n° 0003
A
3/4”BØ 40C42D86EØ 42F70
Code
543513
Weight (kg)
1,06
D
A
B
A
C
E
F
1/2”
197
1115
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Code 543513
Temperature safety relief valve. EC certified and approved to German DIN standards. Redundant safety sensor. Connections 3/4”
F. Chrome plated brass body. Stainless steel spring. EPDM seals. Temperature range 5 –110°C. Nominal set temperature 95°C.
Maximum working pressure 10 bar. Complete with 1/2” M remote probe with pocket. Length of capillary 1300 mm.
SPECIFICATION SUMMARIES
Operating principle
When the temperature rises, the fluid contained within the sensor
(1) undergoes a change of state from liquid to gas. The consequent
volume increase creates a mechanical movement causing the
expandable bellows (2), inside the valve, to push on the obturator
and lift it up.
Construction details
Redundant expansion system
The entire expansion system has a built-in
redundancy (1)-(2) to ensure maximum
safety, so if one part of the sensor system
fails the other part will perform the same
functions as the entire sensor.
Pocket and capillary tubes
The size of the pocket is such that it is always in contact with the
sensors, which improves heat transmission and keeps thermal
inertia to a minimum. The capillary tubes are protected by a
galvanized sheath.
Bellows holder support
The bellows holder support is made of
acetalic resin and can be repositioned by
loosening the knurled lock nut.
Drain
The lower part of the valve contains a button
in order to drain the system.
1 2
1 2
➩
We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.
CALEFFI S.P.A. · I · 28010 FONTANETO D’AGOGNA (NO) · S.R. 229, N.25 · TEL. +39 0322 8491 R.A. · FAX +39 0322 863723
· www.caleffi.com · info@caleffi.com ·
© Copyright 2007 Caleffi S.P.A.
CALEFFI
Installation
DOMESTIC
water supply
safety
discharge
mains
inlet
Hot
water
storage
safety
discharge
mains
inlet
The sensor should be mounted at the top of the boiler or on the
outlet piping upstream of any isolating device and at a maximum
distance of 0,5 m.
1. After mounting the valve on the pipe, according to the flow
direction indicated on the valve body, place the part connected
to the sensor in its seat.
2. Loosely tighten the knurled lock nut.
3. Position the sheath outlet that connects the probe by turning the
black cap. Completely tighten the knurled lock nut.
Installation of
the temperature
safety relief valve
in boilers with
built-in heater.
Installation of
the temperature
safety relief valve
in the emergency
heat exchanger.
Accessories
We recommend
inserting a visible
discharge tundish
(5521 series Caleffi)
when connecting the
device to the
discharge pipe.
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