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Automatic backwash filter

Technical Specifications

Product model: ZGP
Nominal diameter: DN40 to DN1000
Filter material: Stainless steel
Working pressure: PN1.6MPa to 6.4MPa
Connection method: Flange
Applicable temperature range: -20℃ to +450℃
Function: Filters impurities in the pipeline
Valve body material: Cast steel, stainless steel
Applicable media: Water, oil, steam, gas, liquid, etc.

Sales Hotline：

0086-21-59110018

Product Details

Product Overview

The fully automatic backwash filter is a type of filter that can filter using low-quality water. It has the function of automatically backwashing to quickly remove impurities. It is usually installed in front of heat exchangers, air conditioning systems or actuators, and performs irregular backwashing to remove impurities. It can be used for the pre-treatment of raw water in drinking water plants, the treatment of industrial water, the pre-treatment and final treatment of domestic water, and the recovery of useful substances from industrial wastewater, etc.

Product features

1. No supporting structure is required, saving installation space.
2. No bypass is required, thus saving investment costs;
3. It can maintain a high flow rate while also having a low pressure drop;
4. Installation is flexible. It can be installed horizontally as well as vertically.

Working principle

1. Normal operating condition

When the manual butterfly valve is opened, the valve plate plane is parallel to the axis of the cylinder, (and at this time, the wrench is also parallel to the cylinder axis) the sewage valve is closed. At this point, the water flows directly from the inlet into the internal part of the filter net cylinder, passes through the filter net for filtration, and then is discharged from the outlet.

2. Backwashing operation status

When the manual butterfly valve is closed, the plane of the valve plate is perpendicular to the axis of the cylinder (at this time, the wrench rotates 90 degrees and is perpendicular to the cylinder axis). Open the sewage valve. At this point, the water flows from the inlet into the front end of the filter net cylinder. Due to the closed butterfly valve, the water is blocked by the valve plate and can only enter the outside of the filter cylinder through the front mesh holes. Most of it flows out from the outlet. However, because the sewage outlet is open, the water in the rear section of the filter cylinder is discharged and the pressure drops. Therefore, some water is backflowed into the net cylinder through the mesh holes at the rear section of the filter from the filter cylinder rear section, thereby achieving the purpose of rinsing the impurities adhering to the inner wall of the net cylinder from the outside of the filter net. The impurities and sewage are discharged from the sewage outlet.

Main external dimensions (right-angle type)

Model number	L（mm）	A（mm）	B（mm）	C（mm）	D（mm）	Discharge outlet DN	Traffic (T/h)
ZPG-L-40	450	230	80	226	90	15	12
ZPG-L-50	550	285	90	244	100	15	19
ZPG-L-65	550	285	100	270	120	20	28
ZPG-L-80	610	300	120	310	140	25	50
ZPG-L-100	660	330	160	365	180	32	80
ZPG-L-125	800	400	190	440	200	40	125
ZPG-L-150	900	580	220	520	230	50	160
ZPG-L-200	1120	625	260	670	280	65	320
ZPG-L-250	1150	650	310	830	330	80	490
ZPG-L-300	1310	750	350	1000	380	100	710
ZPG-L-350	1514	875	410	1180	450	125	970
ZPG-L-400	1730	1000	470	1350	480	150	1260
ZPG-L-450	1896	1125	510	1500	500	150	1600
ZPG-L-500	2080	1250	550	1680	580	150	1970
ZPG-L-600	2490	1500	650	2000	650	200	2850
ZPG-L-700	2680	1600	680	2150	700	200	3880
ZPG-L-800	2880	1750	700	2300	820	200	5080
ZPG-L-900	3150	1850	800	2480	880	200	6410
ZPG-L-1000	3370	2000	900	2675	920	250	9910

Main overall dimensions (straight-through type)

Model number	L（mm）	A（mm）	B（mm）	D（mm）	Discharge outlet DN	Traffic (T/h)
ZPG-I-40	450	385	63	90	15	12
ZPG-I-50	455	390	70	100	15	19
ZPG-I-65	550	450	83	120	20	28
ZPG-I-80	550	460	96	140	25	50
ZPG-I-100	610	520	128	180	32	80
ZPG-I-125	660	540	162	200	40	125
ZPG-I-150	800	660	189	230	50	160
ZPG-I-200	840	700	220	280	65	320
ZPG-I-250	875	750	255	330	80	490
ZPG-I-300	1050	780	294	380	100	710
ZPG-I-350	1200	885	331	450	125	970
ZPG-I-400	1400	1040	377	480	150	1260
ZPG-I-450	1550	1145	420	500	150	1600
ZPG-I-500	1700	1250	462	580	150	1970
ZPG-I-600	2000	1460	537	650	200	2850
ZPG-I-700	2280	1720	607	700	200	3880
ZPG-I-800	2500	1900	685	820	200	5080
ZPG-I-900	2800	2180	785	880	200	6410
ZPG-I-1000	3120	2470	860	920	250	9910