Valves for liquids

Relief Valves GLV-Series are spring loaded pressure relieving devices, suitable for discharge of incompressible fluids. GLV-series relief valves are used to protect personnel and equipment by preventing excessive pressure accumulation.

Coi Technology offers a large range of screwed and flanged valves in a variety of sizes, materials and options.
The valves are of a full nozzle type and available in Steel or plastic versions.

Version in stainless steel

Model	Available connections	Setting range	Specs
GLV Type A	1/2″-3/4″ NPT/GAS \| DN15 – DN20 ASME/DIN	da 0,5 a 690 bar	More…
GLV Type B	1/2″ – 3/4″ – 1″ NPT/GAS \| DN15 – DN25 ASME/DIN	da 0,5 a 690 bar	More…
GLV Type C	1″ – 1 1/2″ NPT/GAS \| DN25 – DN40 ASME/DIN	da 0,5 a 415 bar	More…
GLV Type D	1 1/2″ – 2″ NPT/GAS \| DN40 – DN50 ASME/DIN	da 0,5 a 220 bar	More…
GLV Type F	1/4″ – 1/2″ NPT/GAS	da 0,5 a 790 bar	More…

Applicazioni

Materiali

other exotic materials are available

Design

Construction	Angle-type
Seat sealing type	PTFE, PEEK, Metal to Metal, Viton, Kalrez, EPDM
Connections	Screwed and flanged (ANSI / DIN)
Connections types	NPT, GAS/BSPP
Flange ratings	ASME 150 ÷ 2500 / PN16 ÷ PN 400
Sizes	1/2” ÷ 2” / DN 15 ÷ DN 50
Orifices	6, 8, 10, 14, 20, 25, 30 mm
Characteristic	Full lift
Overpressure	10%
Blowdown	15%
Discharge coeff. Kd	0.7
Temperature range	-196°C +350°C
Set pressure range	0.5 ÷ 800 barg
Design standard	EN 4126-1

Certificazioni

CE PED/2014/68/EU
ATEX 2014/34/EU

Version in plastic

Model	Available connections	Setting range	Specs
GLV Tipo A	1/2″-3/4″ GAS \| DN15 – DN20 ASME/DIN	da 0,5 a 12 bar	Vai…
GLV Tipo B	1/2″ – 3/4″ – 1″ GAS \| DN15 – DN25 ASME/DIN	da 0,5 a 12 bar	Vai…
GLV Tipo C	1 1/2″ GAS/BSPP \| DN40 ASME/DIN	da 0,5 a 12 bar	Vai…
GLV Tipo D	1 1/2″ – 2″ GAS/BSPP \| DN40 – DN50 ASME/DIN	da 0,5 a 9 bar	Vai…

Applications

Materials

PVC
PVC-C
PP
PVDF
PTFE

Design

Construction	Angle-type
Seat sealing type	PTFE
Connections	Screwed and flanged (ANSI / DIN)
Connections types	GAS/BSPP
Flange ratings	ASME 150 ÷ 300 / PN16 ÷ PN 40
Sizes	1/2” ÷ 2” / DN 15 ÷ DN 50
Orifices	10, 14, 20, 25, 30 mm
Characteristic	Full lift
Overpressure	10%
Blowdown	15%
Discharge coeff. Kd	0.7
Temperature range	-20°C +180°C
Set pressure range	0.5 ÷ 12 barg
Design standard	EN 4126-1