Automatic Backwash Water Strainer

0.6Mpa~2.5Mpa
21m3/h~3890m3/h
Carbon Steel, Stainless Steel

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Fully Automatic · PLC Controlled · Compound Filth Discharge

ZLSG Series Automatic Backwash Water Strainers for Power Plant Cooling Water

Nominal pressure 0.6~2.5MPa, flow capacity 21~3890 m³/h, filtration accuracy 0.05~6mm — ZLSG-G (inlet up/outlet down) and ZLSG-B (outlet up/inlet down) types with dual-scissor anti-clogging design.

Overview

Automatic backwash water strainer is one type of fully-automatic water strainer, which is mainly divided into two types: ZLSG-G (GII) and ZLSG-B. The ZLSG-G (GII) Water Strainer has a structure with inlet up and outlet down, while the ZLSG-B Water Strainers is outlet up and inlet down, which is improved from the basic ZLSG. The reason for this design is to meet the requirement of power station’s different pipe arrangement. ZLSG-G (GII), the ZLSG-B (ZLSG) series full-automatic backwash water strainer are composed of water strainer main body (composed of shell, cover-end-piece flange, rotation mechanism, filtration mechanism, filth discharge mechanism), electric cyclonical pin wheel reducer, electric filth discharge ball valve, water chiller controller, pressure gauge and PLC electronic control cabinet. Although ZLSG-G(GII), ZLSG-B(ZLSG) full-automatic water strainer are quite different in mechanical structure and adaptable performance, they are both featured with the function of automatic filtration, automatic counter-flushing filth discharge and so on, and will not influence the normal amount of water pipe’s water supply. PLC control technology has been adopted in electronic control, which can make time filth discharge, differential pressure filth discharge, manual filth discharge and reducer’s failure alarm, differential pressure overload alarm, over force moment failure alarm function. Running without people taking charge can also be achieved. In addition, ZLSG-G (GII) and ZLSG-B are both set opening manhole on upper tank, so that the repair will be quite convenient without disassembling the whole. Flowspec Luokai manufactures the automatic backwash water strainer with nominal pressure of 0.6~2.5MPa and flow capacity of 21m³/h~3890m³/h. Contact us today. Get the better prices. 30 years of experience. Great after-sales service.

1. Features

  • Main parts of all kinds of pumps, valves in the pipeline. The water strainer equipment is developed on basis of foreign technology, such as America, Israel and Italy
  • The water strainer has overcome almost all the shortcomings of present domestic and foreign technology
  • Vertical installation, water inlet is up while water outlet is down
  • No pollutant blockage
  • Adopting small drum filtering technique
  • Adopting combined coarse screen. Water comes into the vessel from upper part, and comes out from lower part. Service manhole is provided. Fine cartridge is of special construction. Stationary discharge support is connected with shaft vertically

2. Technical Specifications

  • Nominal pressure: 0.6MPa, 1.0MPa, 1.6MPa, 2.5MPa
  • Working pressure: 0.25-1.0MPa, 0.25-1.6MPa, 0.25-2.5MPa
  • Pressure loss: 0.01-0.03MPa
  • Water loss during discharge: <5%
  • Power supply: AC 380V, 50Hz (or other voltage grade)
  • Filtration accuracy: 0.05~6mm
  • Differential pressure set value scope: 0.02-0.1MPa (adjustable)
  • Automatic wash time: 5 min or according to working condition
  • Applicable medium: water, waste water, sewage
  • Applicable temperature: ≤+80℃

3. Applications

  • Hydropower plant
  • Thermal power plant
  • Steel work
  • Chemical industry

4. Key Technologies

  • G compound filth discharge: gravity separation with upper/lower tanks, national patent technology
  • Large filtration area: laser hole punching maximizes area, 2× pipe sectional area even during discharge
  • Double scissors design: cuts long objects through filters during rotation, prevents blockage
  • Filter fast examination: special manhole for filter removal without full disassembly
  • PLC control: time/differential pressure/manual discharge, failure alarm, computer monitoring

Automatic Backwash Water Strainer — Structure
Automatic Backwash Water Strainer — Structure

Automatic Backwash Water Strainer — Dimensions
Automatic Backwash Water Strainer — Dimensions

ZLSG-G (GII) Parameter Table

Type Designed flux (m³/h) In/out caliber (mm) Discharge caliber (mm) Reducer Power (kW) Reducer Type Reducer output rev (rpm) Wash water valve power (kW)
ZLSG-50G 21 50 20 0.37 XLED-32 3 0.05
ZLSG-65G 36 65 20 0.37 XLED-32 3 0.05
ZLSG-80G 54 80 25 0.37 XLED-32 3 0.05
ZLSG-100G 100 100 50 0.37 XLED-32 3 0.05
ZLSG-125G 113 125 50 0.55 XLED-42 2 0.09
ZLSG-150G 191 150 50 0.55 XLED-42 2 0.09
ZLSG-200G 340 200 65 0.75 XLED-53 1.5 0.09
ZLSG-250G 530 250 65 0.75 XLED-53 1.5 0.09
ZLSG-300G 750 300 100 0.75 XLED-53 1.5 0.09
ZLSG-350G 1039 350 100 0.75 XLED-63 1.5 0.18
ZLSG-400G 1200 400 100 1.1 XLED-63 1.5 0.18
ZLSG-450G 1500 450 100 1.1 XLED-63 1.5 0.18
ZLSG-500G 2120 500 125 1.1 XLED-63 1.0 0.25
ZLSG-600G 3055 600 150 1.5 XLED-74 1.0 0.37
ZLSG-700G 3890 700 150 1.5 XLED-74 1.0 0.37

ZLSG-B (ZLSG) Parameter Table

Type Designed flux (m³/h) In/out caliber (mm) Discharge caliber (mm) Reducer Power (kW) Reducer Type Reducer output rev (rpm) Wash water valve power (kW)
ZLSG-50B 21 50 20 0.37 XLED-32 3 0.05
ZLSG-80B 54 80 25 0.55 XLED-42 2 0.05
ZLSG-100B 100 100 40 0.55 XLED-42 2 0.05
ZLSG-125B 113 125 50 0.75 XLED-53 1.5 0.09
ZLSG-150B 191 150 50 0.75 XLED-53 1.5 0.09
ZLSG-200B 339 200 65 0.75 XLED-63 1.5 0.09
ZLSG-250B 530 250 80 0.75 XLED-63 1.5 0.18
ZLSG-300B 750 300 100 1.1 XLED-63 1.5 0.18
ZLSG-400B 1200 400 100 1.5 XLED-74 1.0 0.25
ZLSG-500B 2120 500 125 1.5 XLED-74 1.0 0.25

ZLSG-G (GII) External Dimensions (mm)

Type H H1 H2 H3 H4 H5 D D1 A B C
ZLSG-50G 1100 568 250 148 600 100 8350 8390 264 230 314
ZLSG-65G 1100 568 250 148 600 100 8350 8390 264 230 314
ZLSG-80G 1420 750 320 190 780 120 8450 8500 340 285 400
ZLSG-100G 1420 750 320 190 780 110 8450 8500 340 285 400
ZLSG-125G 1650 760 320 200 820 110 8500 8550 400 320 450
ZLSG-150G 1650 760 320 200 820 110 8500 8550 400 320 450
ZLSG-200G 1970 950 450 240 1050 120 8600 8640 450 350 450
ZLSG-250G 2115 1030 510 260 1120 120 8700 8680 510 420 510
ZLSG-300G 2115 1080 550 300 1195 120 8700 8680 510 420 510
ZLSG-350G 2210 1160 550 300 1270 150 8800 8900 570 450 570
ZLSG-400G 2310 1280 610 340 1350 150 8800 8900 570 450 570
ZLSG-500G 2900 1540 700 400 1680 200 81100 81150 750 650 750
ZLSG-600G 3650 1950 850 450 2150 250 81300 81300 850 750 850
ZLSG-700G 3650 1950 850 450 2150 250 81300 81300 850 750 850

ZLSG-B (ZLSG) External Dimensions (mm)

Type H H1 H2 H3 H4 D D1 A B
ZLSG-50B 1190 250 550 170 100 8350 8400 250 240
ZLSG-80B 1250 260 600 170 100 8400 8450 300 260
ZLSG-100B 1320 270 700 190 100 8450 8500 340 285
ZLSG-125B 1580 320 760 200 110 8500 8550 360 320
ZLSG-150B 1580 320 760 200 110 8500 8550 360 320
ZLSG-200B 1850 385 880 265 120 8600 8640 420 380
ZLSG-250B 1950 400 980 290 120 8700 8680 460 420
ZLSG-300B 1950 400 980 290 120 8700 8680 460 420
ZLSG-400B 2475 560 1200 340 150 8900 8900 620 530
ZLSG-500B 2985 700 1500 450 150 81100 81150 750 650

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