Danfoss SFV 25 safety relief valve, G thread, set pressure 21 bar (305 psig)

Danfoss SFV 25 back-pressure-dependent safety relief valve, store code 2416+155, set pressure 21 bar g (305 psig), supplied with a pressure-setting certificate. SFV 20 and SFV 25 are standard, back-pressure-dependent safety relief valves in angle-way execution, designed to protect pressure vessels and other components against excessive pressure in industrial refrigeration plant. On a rise above the set pressure the valve starts to open, is fully open before the pressure is 10% above set pressure, and is fully closed again before the pressure falls 10% below set pressure (DIN 3320 characteristic). The housing is special steel approved for low-temperature operation; the spindle and seat are stainless steel for precise operation, and the valve cone gasket is a special chloroprene (neoprene) compound. The spring housing is closed tightly to avoid refrigerant leakage. After the set pressure is adjusted at Danfoss the valve is sealed, and a metal plate records the flow diameter, set pressure, date of production, production number and type-approved code. Applicable for R717 (ammonia), HFC and HCFC (e.g. R22, R134a, R404A) and R744 (CO2), within a temperature range of -30 to +100 C (-22 to +212 F). The valves are designed for a strength test of 43 bar g (624 psig). It is recommended that the valves be installed in pairs in conjunction with the DSV double stop / change-over valve so one valve can be inspected or replaced while the other keeps the vessel protected. Approved in accordance with the Pressure Equipment Directive (PED) and CE marked; discharge capacity certified to ISO 4126-1 / EN 13136. This code is an SFV 25 (nominal valve size 25 mm (1 in), flow diameter 23 mm (0.906 in), flow area 415 mm2 (0.643 in2)) with G outside-pipe-thread connections per ISO 228/1: inlet G 1 1/4 in, outlet G 1 1/2 in. Set pressure 21 bar g (305 psig); de-rated certified coefficient of discharge Kdr 0.48; valve lift 4.5 mm. PED 2014/68/EU category IV, fluid group I, CE marked. Specifications per Danfoss store code 2416+155.

Type

SFV 25 safety relief valve (back-pressure-dependent, angle-way)

Code number

2416+155

Set pressure

21 bar g (305 psig)

Pressure certificate

pressure-setting certificate included

Nominal valve size

25 mm (1 in)

Flow diameter

23 mm (0.906 in)

Flow area A0

415 mm2 (0.643 in2)

De-rated certified coefficient of discharge Kdr

0.48

Valve lift

4.5 mm

Inlet connection

G 1 1/4 in (ISO 228/1 outside pipe thread)

Outlet connection

G 1 1/2 in (ISO 228/1 outside pipe thread)

Pressure setting range (family)

10-25 bar g (145-363 psig)

Strength test pressure

43 bar g (624 psig)

Media temperature range

-30 to 100 C (-22 to 212 F)

Applicable media

R717 (ammonia), HFC, HCFC (R22, R134a, R404A), R744 (CO2)

Housing material

special low-temperature steel

Spindle and seat

stainless steel

Cone gasket

special chloroprene (neoprene) compound

Conformity assessment

PED 2014/68/EU, category IV, fluid group I, CE marked

Discharge capacity standard

ISO 4126-1 / EN 13136

Approvals

CE, EAC

Net weight

3.946 kg

Gross weight

3.946 kg

EAN

5702428193450

Size / Series

Inlet G 1 1/4 in x outlet G 1 1/2 in (ISO 228/1)

Material

Special low-temperature steel housing; stainless steel spindle and seat; chloroprene (neoprene) cone gasket

Thread Standard

ISO 228/1

Pressure Rating

21 bar g (305 psig) set pressure

Temperature Range

-30 to 100 C

HS Code

8481.40