Butterfly Valve Series

• Cast Iron Butterfly Valves
• Ductile Iron Butterfly Valves
• Stainless Steel Butterfly Valves
• Triple Offset Butterfly Valves
• AWWA C504 Butterfly Valves
• Large Diameter Butterfly Valves
• Sanitary Butterfly Valves
• Flanged Butterfly Valves
• Lug Butterfly Valves
• Wafer Butterfly Valves
• High Vacuum Butterfly Valves

Product drawing»

Structural drawing»

Accumulator(Emergency Off) Quick Off Butterfly Valve

product drawing

The introduction of product

In gas cogeneration systems and heating steam turbine exhaust system, KD7X42/3P accumulator (emergency off) quick off valve is used as a system safety, has been widely used. Its close quickly, small flow resistance, globe can be sealed and other excellent properties make it can replace the original system design of electric globe butterfly valve and check valve. KD7X42/3P accumulator (emergency off) quick off valve is mainly used in thermal power plant units and gas heating generators as the emergency off valve for the safety protection of system. The main features are: 1, the quick off time is up to 0.5 seconds, the emergency off is safe and reliable. 2, three eccentric metal seal structure, open and closed is light and flexible, sealing with zero leakage. 3, The room temperature media can choose double eccentric soft sealing structure, and the cost is low, the sealing is reliable. 4, the buffer of the end of the valve is effectively prevent the impact of valve inertia. 5, it can be achieved quick off with the spring, or the accumulator, both forms are similar, safe and reliable.

Dimensions & constructral diagram

Main technical parameter

nominal pressure（MPa）		0.6	1.0	1.6	2.5
nominal diameter（mm）		400～1600 3.75
test pressure （MPa）	intensity test	0.9	1.5	2.4	2.75
	sealing test	0.66	1.1	1.76	2.5
working temperature（MPa）		0.6	1.0	1.6
Applicable medium：water,steam, gas suitable temperature：soft seal：≤80℃；hard seal：≤425℃
performance standard： design reference GB/T 12238, JB/T 5299, JB/T 8527， flange connection: GB/T 17241、GB/T 9113， face to face dimensions: GB/T 12221， pressure test: GB/T 13927

The main external and connection dimensions of KD7X42/3P(unit：mm)

DN	PN	L	L1	L2	L3	L4	flange connection dimensions	remarks
400	0.6	216	556	1449	320	440	GB/T17241 GB/T9113
	1.0	216	556	1449	330	440
	1.6	216	556	1449	345	440
450	0.6	222	556	1449	370	440
	1.0	222	556	1449	380	440
	1.6	222	580	1449	395	490
500	0.6	229	580	1449	400	440
	1.0	229	580	1449	410	490
	1.6	229	580	1449	425	490
600	0.6	267	580	1449	440	490
	1.0	267	580	1449	460	490
	1.6	267	625	1820	470	490
700	0.6	292	625	1449	436	490
	1.0	292	625	1820	550	545
	1.6	292	625	1820	570	545
800	0.6	318	625	1820	625	490
	1.0	318	625	1820	640	545
	1.6	318	625	1820	660	545
900	0.6	330	625	1820	700	545
	1.0	330	625	1820	710	545
	1.6	330	675	1820	725	610
1000	0.6	410	625	1820	760	610
	1.0	410	675	1820	770	610
	1.6	410	675	2180	790	610
1200	0.6	470	675	1820	875	610
	1.0	470	675	2180	890	610
	1.6	470	729	2180	915	720
1400	0.6	530	729	2180	1000	720
	1.0	530	729	2180	1020	720
	1.6	530	781	2180	1045	960
1600	0.6	600	781	2180	1120	720
	1.0	600	781	2180	1140	960

Note: it can produce DN250-3000(GB12221-89) long series according to customers’ requirements,from DN1200-3000 with bottom foot must be marked.

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