Caleffi 312 Series Safety Relief Valve 1/2″, Male × Female
1/2'' 2.5 Bar Safety Relief Valve - CALEFFI - 312425
Safety relief valve.
Female connections.
Discharge overpressure: 20%.
Closing differential: 20%.
PN 10.
Temperature range: 5÷110°C.
Settings: 1.5 - 2 - 2.5 - 3 - 3.5 - 4 - 5 - 5.5 - 6 -
7 - 8 - 9 bar (1.5 bar for 1/2” size only,
2 - 5.5 - 9 bar for 3/4” size only).
Technical specifications
Materials:
Body: - 1/2”-3/4”: brass EN 12165 CW617N
- 1”-1 1/4”: brass EN 1982 CB753S
Cover: brass EN 12165 CW617N
- 513-514 (1/2”): PA6G30
Control stem: brass EN 12164 CW614N
Obturator seal: EPDM
Diaphragm: EPDM
Spring: steel UNI 3823
Control knob: - 311-312-313-314-513 (1/2”)-514: ABS
- 513 (1” and 1 1/4”)-527 EST: PA6G20
Nominal pressure: PN 10
Temperature range: 5–110°C
Performance:
Max. opening pressure: 527 EST; Pset +10%·Pset
311-312-313-314-513-514; Pset +20%·Pset
Min. closing differential: Pset - 20%·Pset
Medium: water, air
PED category: IV
Settings:
311 series 1.5-2-2.5-3-3.5-4-5-5.5-6-7-8-9 bar
(1.5 bar 1/2” only) (2-5.5-9 bar 3/4” only)
313 series 2.5-3-6-7-8 bar
314 series with pressure gauge 2.5-3-6-7-8 bar
313 series with pressure gauge connection 3 bar
314 series with pressure gauge connection 3-6 bar
513 series 1.5-2-2.5-3-3.5-4 - 5.5-6-7-8-9 bar
(1.5-2 1/2” and 1” only) (4-5.5-9 1” only)
514 series 2-2.5-3-3.5-4-5-6-7-8 bar
527 EST series standard 2.25-2.5-2.7-3-3.5-4-4.5-5-5.4-6 bar
527 EST series special 1-1.5-2-7-8 bar