Structural Composition

Vessel: Vertical / horizontal type, made of carbon steel (Q235) or 304/316L stainless steel, with pressure-bearing sealing structure.

Filter Cartridge Assembly: Equipped with 3 to 30 stainless steel filter cartridges (wedge wire screen / sintered mesh / pleated mesh), arranged vertically or horizontally.

Cartridge-by-Cartridge Backwash Mechanism: Consists of rotating backwash arm and sealing seat; only one or two cartridges are targeted for offline backwashing at a time.

Actuator: Electric or pneumatic type to drive the backwash arm and drain valve.

Control System: PLC / microcomputer controller, supporting three operation modes: differential pressure trigger, timed trigger and manual trigger, equipped with alarm function and remote signal transmission.

Working Principle

Normal Filtration:Fluid flows through the filter cartridges from outside to inside; contaminants are trapped on the outer surface of cartridges, and clean fluid discharges from the outlet.

Backwash Trigger:Cartridge-by-cartridge backwashing is activated when the differential pressure reaches the set value (0.05～0.2 MPa) or the preset cleaning cycle expires.

Offline Cartridge-by-Cartridge Backwashing:The rotating backwash arm aligns with only one or two cartridges at a time. It cuts off the filtration passage of the targeted cartridges and opens the drain port. The remaining cartridges stay online for continuous filtration, so the system maintains uninterrupted flow without shutdown.

Sequential Cycle:Once one cartridge is fully cleaned, the arm automatically switches to the next one. The cycle repeats until all cartridges are backwashed, then the unit resumes normal filtration mode.

Applicable Standards

Design & Manufacturing: HG/T 21637-1991, SH/T 3411

Flange Standards: GB, HG, ANSI, DIN, GOST

Electrical Control Standards: GB/T 14048.1, GB 50054

Core Features

Single-Cartridge Offline Backwashing:Only one cartridge is cleaned at a time, resulting in minimal backwash fluid consumption and slight impact on system pressure.

Uninterrupted Online Flow:The backwashing process does not interfere with the flow rate and pressure of the main pipeline, ideal for continuous production working conditions.

Precise Filtration:Filtration precision ranges from 0.1 to 100 μm; filter cartridges are reusable after repeated cleaning with long service life.

High Pressure Resistance:Maximum working pressure reaches 4.0–10 MPa, suitable for high-pressure water injection, oil & gas, chemical and other industries.

Low Consumption & High Efficiency:Single-cartridge backwashing takes only 5–20 seconds, with backwash fluid consumption ≤0.5% of the total flow rate.

Parameters

Item	Parameter Range	Remarks
Model	ESGF-Z Series	Vertical / horizontal cartridge-by-cartridge type, customizable with 3–30 cartridges
Nominal Diameter	DN25 ~ DN300 (inlet & outlet)	Flange standard: HG/T20592, ASME B16.5
Treatment Flow Rate	5 ~ 1000 m³/h per unit	Maximum 5000 m³/h when multiple units operate in parallel
Working Pressure	0.1 ~ 1.6 MPa (standard); high-pressure version: 2.5 ~ 4.0 MPa	Optional pressure classes: PN10/16/25/40/63
Filtration Precision	0.1～100 μm	Wedge wire screen: 10 ~ 100 μm; sintered / pleated mesh: 0.1 ~ 50 μm
Operating Temperature	0 ~ 150 °C (standard)	Carbon steel vessel ≤380 °C; stainless steel vessel ≤480 °C
Control Mode	Differential pressure / timed cycle / manual	Differential pressure range: 0.05 ~ 0.2 MPa; timed cycle range: 1 ~ 24 h
Single-Cartridge Backwash Time	5 ~ 20 s (adjustable)	Cartridges are cleaned one by one, others maintain online uninterrupted flow
Backwash Medium Consumption	≤0.5% of total flow rate	Backflushed with medium from the system itself, no external water supply needed
Vessel Material	Carbon steel Q235 / 304 / 316L stainless steel	Duplex stainless steel, titanium alloy available as options
Filter Cartridge Material	304/316L wedge wire screen, sintered mesh, pleated cartridge	Uniform slot clearance, reusable after repeated cleaning
Drive Mode	Electric (standard) / Pneumatic / Explosion-proof	Suitable for flammable, explosive and high-pressure working conditions

Product Certifications