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01130/05 GB
Temperature and pressure relief valve
309 series
General information
The temperature and pressure relief valves (TP) 309 series are made
by Caleffi S.p.A in compliance with the essential safety requirements
laid down by Directive 97/23/EC of the European Parliament and the
Council of the European Union for harmonisation of Member States
with regard to pressurised equipment.
Function
The TP relief valve controls and limits the temperature and pressure
of the hot water contained in a domestic storage heater and prevents
it from being able to reach temperatures of over 100°C, with the
formation of steam.
On reaching the settings, the valve discharges a sufficient amount
of water into the atmosphere so that the temperature and pressure
return within the system’s operating limits.
This particular series of valves is certified as conforming to the
performance requirements of the European standard EN 1490
(for settings of 4 - 7 - 10 bar).
Product range
309 series Temperature and pressure relief valve Sizes 1/2” x Ø 15 mm, 3/4” x Ø 15 mm and 3/4” x Ø 22 mm
CALEFFI
Dimensions
Technical specifications
Materials: - body: dezincification-resistant alloy
EN 12165 CW602N
- stem: brass EN 12164 CW614N
- obturator and diaphragm: EPDM
- spring: steel EN 10270-1 SH
- control knob:
PA6GF
Nominal pressure: PN 10
Discharge rating: - 1/2” and 3/4” Ø 15; 10 kW
- 3/4” Ø 22; 25 kW
Medium: water
PED category: IV
Settings: - temperature: 90°C
- pressure: 3 - 4 - 6 - 7 - 10 bar
Connections:
1/2” M x Ø 15 mm with compression fitting for copper pipe
3/4” M x Ø 15 mm with compression fitting for copper pipe
3/4” M x Ø 22 mm with compression fitting for copper
pipe
Code completion ( . . )
Code 3094..
Code 309542 Code 3095..
30 ➙ 3 bar 40 ➙ 4 bar 60 ➙ 6 bar 70 ➙ 7 bar 00 ➙ 10 bar
42 ➙ 4 bar 30 ➙ 3 bar 60 ➙ 6 bar 70 ➙ 7 bar 00 ➙ 10 bar
cert. n° 0003
ISO 9001
1115
Code
3094 ..
309542
3095 ..
A
1/2”
3/4”
3/4”
B
Ø 15
Ø 15
Ø 22
E
D
A
F
C
40
43
43
D
102
99
99
B
C
F
E
88
91
91
39
39
39
Weight (kg)
0,253
0,261
0,310
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Operating principle
The valve opens the outlet on reaching the settings for:
-
temperature: the thermostat compound inside the temperature sensor 1) submerged in the ho
t
water storage heater, expands as the temperature increases. This expansion causes a thrust
pin to move and act on the obturator 2) opening the valve. The valve is set to open at
temperatures of over 90°C.
-
pressure: the obturator, opposed by a set spring, raises on reaching the pressure setting and
opens the outlet completely. The pressure setting is chosen according to the maximum
permissible pressure in the system.
As the temperature and pressure decrease, the opposite action occurs with the valve
subsequently reclosing within the set tolerances.
Certification
CE mark
309 series TP relief valves comply with the essential safety requirements of Directive 97/23/EC
concerning pressure equipment (also called P.E.D.). They are therefore classified as category IV
and are equipped with the CE mark.
Product certification in accordance with European Standard EN 1490
European Standard EN 1490: 2000, entitled “Building valves - Combined temperature and
pressure relief valves – Tests and requirements”,
describes the constructional and performance
specifications that TP relief valves must have.
Caleffi 309 series TP relief valves are certified by Buildcert (UK) to comply with the requirements
of the European Standard EN 1490 (for settings 4 – 7 – 10 bar).
Installation
Before installing a TP relief valve it is necessary for the sizing to be performed correctly by specialized technical personnel in accordance with
the current regulations for the specific applications. Any use other than the intended use is prohibited.
The TP relief valves must be installed by qualified technical personnel in accordance with current regulations.
The TP relief valve must be installed observing the direction of flow indicated by the arrow on the valve body.
Assembly
Plumbing system
TP relief valves must be installed on the top of the hot water storage
heater, making sure that the temperature sensor is correctly
submerged in the tank.
Make sure that there are no shut-off devices between the valve and
the storage heater.
TP relief valves can
be fitted vertically or
horizontally, but not
overturned.
This prevents debris
from impairing
operation.
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.INT. +39 0322 8491 R.A. · FAX +39 0322 863723
· Http://www.caleffi.com · E-mail: info@caleffi.it ·
309 series
Temperature and pressure relief valve. Equipped with the CE mark in accordance with directive 97/23/EC. Threaded 1/2” M
connections on the inlet and Ø 15 mm (3/4”x Ø 15 mm and 3/4”x Ø 22 mm) with compression fitting for copper pipe on the
outlet. Temperature setting 90°C. Pressure setting 3 bar (available settings: 3-4-6-7-10 bar for 1/2”, 4 bar for 3/4” x Ø 15 mm,
3-6-7-10 bar for 3/4” x Ø 22 mm). Valves with 4-7-10 bar setting certified to EN 1490 standard. Discharge rating: 1/2” x Ø 15 mm:
10 kW, 3/4” x Ø 15 mm: 10 kW, 3/4” x Ø 22 mm: 25 kW. Medium: water. Nominal pressure: PN 10. Dezincification-resistant
alloy body. Brass stem. Obturator and diaphragm in EPDM. Steel spring. Control knob in glass-fiber re-inforced nylon.
SPECIFICATION SUMMARIES
Correct installations
Correct installation
Incorrect installation
Incorrect installation
2
1
HOT WATER
STORAGE
HEATER
HOT WATER
STORAGE
HEATER
HOT WATER
STORAGE
HEATER
HOT WATER
STORAGE
HEATER
SOLAR
STORAGE
SOLAR
STORAGE
CALEFFI
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