Weflo Fig. F1511 Alarm Check Valve – Datasheet & Price Quote

Name: Weflo Fig. F1511 Alarm Check Valve – Datasheet & Price Quote
Brand: Weflo
SKU: Fig. F1511

Wet-pipe alarm check valve with retard chamber and trim

The Weflo Fig. F1511-300 is an alarm check valve for wet-pipe (automatic sprinkler) fire protection systems. It acts as the system check valve and, when water flows at a rate equal to one or more sprinklers, it operates an electric alarm through a pressure switch and a hydraulic alarm through a water motor gong. A retard chamber in the trim helps prevent false alarms caused by pressure surges in the supply. The valve is installed vertically on the riser, with the supplied accessories fitted as a trim set.

The datasheet covers three end types for the main valve: F1511-300 with flange by flange, F1512-300 with flange by groove and F1522-300 with groove by groove. The valve is coated inside and out with fusion bonded epoxy to the AWWA C550 standard.

Technical specifications

Values are from the Weflo data sheet for Fig. F1511-300, F1512-300 and F1522-300 alarm check valves.

Parameter	Specification
Type	Alarm check valve with retard chamber, for wet pipe sprinkler systems
Figures	F1511-300 flange x flange; F1512-300 flange x groove; F1522-300 groove x groove
Sizes	2-1/2, 3, 4, 6 and 8 in. in the dimension table
Rated working pressure	UL/FM: 20 to 300 psi; CE: 1.4 to 16 bar
Approvals shown	UL 193 Listed, FM 1041 Approved, 3C and CE certified; the leaflet notes that the 2-1/2 in. valve is UL listed
Flange drilling	EN 1092 PN10/16 or ANSI B16.1 Class 125; other flange types on request
Grooved connection	Cut to standard groove specifications for steel pipe
Coating	Fusion bonded epoxy, interior and exterior, to AWWA C550
Orientation	Install vertically

Materials and trim

Part	Material	ASTM / EN specification
Body	Ductile iron	ASTM A536 Grade 65-45-12 / EN 1563 EN-GJS-450-10
Hinge pin	Stainless steel	ASTM A276 Type 304 / EN 10088 X5CrNi18-10
Disc	Ductile iron	ASTM A536 Grade 65-45-12 / EN 1563 EN-GJS-450-10
Disc seat	Rubber	D2000 EPDM / EN 681 EPDM
Body seat	Bronze	B62 C83600 / EN 1982 CuSn5Zn5Pb5

The trim accessories listed are screwed carbon steel pipe, malleable iron fittings, brass ball, check and angle valves, a brass Y-strainer and restrictor, pressure gauges, a water motor, a pressure switch and a gray cast iron retard chamber.

Dimensions

Size	L1, mm / in.	L2, mm / in.	L3, mm / in.	L4, mm / in.
2-1/2 in.	250 / 9.8	200 / 7.9	150 / 5.9	520 / 20.5
3 in.	250 / 9.8	200 / 7.9	150 / 5.9	520 / 20.5
4 in.	280 / 11.0	250 / 9.8	150 / 5.9	520 / 20.5
6 in.	300 / 11.8	250 / 9.8	190 / 7.5	520 / 20.5
8 in.	320 / 12.6	250 / 9.8	210 / 8.3	520 / 20.5

Selection and documents

Choose the end connection from the riser pipework (flanged or grooved) and the size from the system design flow, and confirm the approval needed for the project. Other Weflo fire protection valves, such as the Weflo Fig. 5306, are listed under Fire Fighting. The attached data sheet has the full specification and dimension drawing. Send the size, end type and quantity for a quotation.

Weflo valve families

The manufacturer program covers OS&Y and NRS gate valves, fire hydrants, check and alarm check valves, butterfly valves, deluge, pre-action, pressure relief and pressure reducing valves, Y and basket strainers, and air relief valves. Weflo states that its OS&Y and NRS gate valves are UL listed and FM approved through 24 inches. Products are identified by figure number, as with the Fig. 1209 balancing valve in our listing.

Ordering Weflo valves: what we need

Send the figure number, size, end connection and flange standard, pressure rating, the medium, and the listing or approval the project specification demands. Approvals apply per figure and size, so we check each line against the manufacturer datasheet. GCC civil defense requirements should be quoted in the request.

Frequently Asked Questions