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The 800X pressure difference balance valve is a kind of valve intended for use between the water supply part and the return water part of an air conditioning system to balance the pressure difference. The 900X emergency shut-off valve belongs to a kind of valve that is intended for use in a water supply system in which the fire fighting water and domestic water are connected in parallel and for the control of the direction of water supply. When a fire breaks out and a large quantity of water is in great need for fire fighting purpose, the 900X emergency shut-off valve cuts off the domestic water supply immediately so as to ensure enough fire fighting water. When the fire fighting is over and the pressure in terms of water use has dropped, the valve switches on automatically to stay in the constantly open state and the normal domestic water supply is restored. This valve makes it unnecessary to set a separate fire fighting water supply network in the system, thereby greatly reducing the construction cost and water consumption. Furthermore, the valve is high in control sensitivity, safe, reliable, simple to debug and offers a long service life. Pressure Rating: PN10. PN16. PN25/Class150Size Range: DN20mm-DN800mm (3/4" - 32")Test and inspection: GB/T 13927 API598

PN	1.0MPa	1.6MPa	2.5MPa
Shell Test	1.5MPa	2.4MPa	3.75MPa
Seal Test	1.1MPa	1.76MPa	2.75MPa
Suitable Temperature	«80ºC
Suitable Medium	Water

DN	20	25	32	40	50	65	80	100	125	150	200	250	300	350	400	450
L	150	160	180	200	203	216	241	292	330	356	495	622	698	787	914	978
H1	247	247	247	278	278	298	313	350	365	420	450	470	490	526	570	570
H	342	342	342	395	395	405	430	510	560	585	675	730	760	840	910	910