Flanged angle type pressure relief valve

Category Pump room control & protection valves

Certificate: UL Listed / FM Approved
Standard: UL 1478, NFPA 20
Connection: Flanged as B16.42 Class 150 / 300, B16.1 Class 125 / 250, EN 1092-2 PN16
Temperature: Max 82°C, water
W. pressure: 250 / 400 psi, etc.
Surface: FBE coating as AWWA C550

Download Flanged angle type pressure relief valve

Product Details

Flanged angle type pressure relief valve (Fire pump relief valve) is used in the discharge of fire pump to automatically relieve excessive pressure, so to maintain constant pressure. It allows the fire pump to be stopped without causing surging.

Available size (Source 1 with UL/FM)

Size	Relief pressure range (psi)	Connection	Working pressure (psi)	Ref.No.
1-1/2″ / DN40	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3301 (UL)
2″ / DN50	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3302 (UL)
2-1/2″ / DN65	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3303 (UL)
3″ / DN80	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3304 (UL/FM)
4″ / DN100	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3305 (UL/FM)
6″ / DN150	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3307 (UL/FM)
8″ / DN200	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3308 (UL/FM)
10″ / DN250	20 ~ 200 / 100 ~ 300	Class 150 / 300	250 / 400	U3309 (ISO)

Note:
1. For size 3″, 4″, 6″, and 8″, the working pressure of Class 300 connection is 300 psi by UL listed, and 400 psi by FM approved.
2. EN/BS flanged end connection is also available by FM approved, including EN 1092-2 PN10, PN16, or PN25.
3. As factory preset, the relief pressure is set at 60 psi for 20 ~ 200 range, 100 psi for 100 ~ 300 range.

Available size (Source 2 with UL/FM)

Size	Relief pressure range (psi)	Connection	Working pressure (psi)	Ref.No.
3″ / DN80	65 ~ 300	Class 125 / 150 / 250 / PN16	300	U3324 (UL/FM)
4″ / DN100	65 ~ 300	Class 125 / 150 / 250 / PN16	300	U3325 (UL/FM)
5″ / DN125	65 ~ 300	Class 125 / 150 / 250 / PN16	300	U3326 (UL/FM)
6″ / DN150	65 ~ 300	Class 125 / 150 / 250 / PN16	300	U3327 (UL/FM)
8″ / DN200	65 ~ 300	Class 125 / 150 / 250 / PN16	300	U3328 (UL/FM)