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Filter series

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HYC

Annex

Backflush control valve of filter

hydraulic control valve is the one which dedicated to full-auto backflush filter system. this kind of valve is driven by pipeline system pressure and can implement two position and three-way switch automatically to realize filter auto-backflush.it also features simple structure, high reliability and long stable without maintenance. diaphragm actuated structure can change water direction in short drive, that is, shut down inlet when backflush port is open, and vice versa.therefore filter overflowing which brings about clean water and waste water mixing can be avoided.

working principle

model	a		b		c		l
model	mm	lnch	mm	lnch	mm	lnch	mm	lnch
51-2×2	90	3 1/4	97.5	4 1/8	97.5	4 1/8	195	7 7/8
58-3×2	157	6 1/8	175	6 7/8	112	4 3/8	287	11 1/4
58-3×3	157	6 1/8	112	4 3/8	175	4 3/8	287	11 1/4
58-4×3	167	6 1/4	126	4 7/8	187	7 1/4	313	12 1/2

product features

simple structure, easy installation, investment saved

ultrastrong hydraulic performance, no friction in processs of station exchangment
high reliability, stable operation of moving parts

accurate position

anti-chemical corrosion, applicable to various medium

water flow turns in speedy, high effectiency in flushing and washing

basic parameters
10bar standard pressure grade: 10bar
minimum working pressure 1.0bar
2"-20 square/hour, cast iron or copper, bayonet/bsp thread
3"-35 square/hour, cast iron or copper, bayonet/bsp thread
4"-80 square/hour,, cast iron or copper, bayonet/bsp thread

typical application

backflush valve is applied to auto-backflush filter system which has two paratactic filtered units at least. that is: during the process of backflush, clean water filtered by one filter unit becomes flush water for another filtered unit.

when hydraulic signal sent by controller is received, backflush valve shall change flow direction: shut down inlet, open outlet, clean water filtered by other filter unit enters this unit to flush, then flushed water is exhausted by drain outlet.