Signal gate valves and signal butterfly valves are used in automatic spraying water pipeline in fire protection system to monitor the water supply pipeline and indicate the valve's opening at a long distance. Rising stem gate valves and opening indicator gate valves are often used in fire protection system, and if the installation position is high to the ground, rising stem gate valves is used and can show the valve's opening clearly while if the installation position is low, opening indicator gate valves is used.

1. Nominal pressure: 1.0-2.5MPaWorking temp.:0-12℃ Flanged end: GB/T17241.6 GB9113,ASME 16.5 etc..
2. Nominal diameter: 50-400mmService: water, oils, gas etc. Inspection and test: GB 13927 API 598

No.	part	material
1	Transmission cap	ductile cast iron, cast steel
2	Hand wheel	Ductile iron
3	Dust proof gasket	Plastic
4	Gasket	Buna-N rubber or EPDM
5	Thrust bearing	Gun metals
6	Cover	Grey cast iron, ductile cast iron, cast steel
7	Bolt	Carbon steel or stainless steel
8	Body	Grey cast iron, ductile cast iron, cast steel
9	Copper nut	Gun metals
10	Stem	Stainless steel
11	Disc	Ductile cast iron packed with rubber or EPDM outside

DN	50	65	80	100	125	150	200	250	300	350	400	450	500	600
L	178	190	203	229	254	267	292	330	356	381	406	432	457	508
H(full open)	732	773	820	870	915	1003	1110	1263	1360	1550	1610	1900	1938	2120