Automatic Self-Cleaning Strainer — Motorized Backwash
The automatic self-cleaning strainer is a motorized backwash filter for 2 inch to 48 inch pipelines, with 50-2000 micron screens and a 220/380/480 V actuator driven by timer or differential pressure. It cleans its own element on a PLC command, so water treatment, cooling and process lines run without manual basket handling.
Product Overview
MOTORIZED BACKWASH
Electric actuator with timer control. Automatic backwash cycle. Continuous flow during cleaning. PLC integration ready.
KEY DIMENSIONS
Where It Is Used
- Water treatment plants: Intake and pre-membrane filtration runs unattended, with backwash triggered by differential pressure instead of an operator round.
- Power plant cooling water: Circulating-water and service-water lines stay clean without a manual crew entering the screen pit each shift.
- Pulp and paper mills: High-fibre process water blinds a basket within hours, so an automatic cycle keeps the line running between planned stops.
- Steel and metal processing: Scale and mill-scale solids are flushed on a timed cycle before they reach spray nozzles and heat exchangers.
- Municipal and district systems: Remote or unmanned pumping stations use the dry contact output to report backwash events to SCADA.
ENVIRONMENTS SERVED
- WATER TREATMENT
- POWER GENERATION
- PULP & PAPER
- STEEL & METAL PROCESSING
- MUNICIPAL PUMPING
Core Parameters
| SIZE | 2"-48" |
|---|---|
| CONTROL | PLC/Manual |
| MESH | 50-2000μ |
| VOLTAGE | 220/380/480V |
| TRIGGER | Differential pressure switch or timer |
| BODY | SS316L / carbon steel epoxy-coated |
| BACKWASH | Motorized brush or differential backflush cycle |
| SIGNAL | 4-20mA / dry contact to plant SCADA |
AUTOMATIC SELF-CLEANING STRAINER vs Manual duplex strainer
| Automatic self-cleaning | Manual duplex strainer | |
|---|---|---|
| Operator attention | Unattended — the actuator starts a backwash cycle on its own and returns to filtering when the cycle ends. | An operator must watch differential pressure, switch chambers and physically clean the dirty basket. |
| Cleaning trigger | Differential-pressure switch or timer, so cleaning happens at the actual loading point rather than a fixed schedule. | Judgement call from a gauge reading or a fixed maintenance round, which cleans too early or too late. |
| Flow during cleaning | Continuous — the backwash consumes a small side stream while the main flow keeps passing. | Continuous only while an operator is present to perform the changeover; a missed round means a blinded basket. |
| Routine labour | Near zero per shift; annual actuator and seal inspection plus periodic screen check. | Recurring basket removal and cleaning labour every shift on high-solids streams. |
| Controls integration | PLC/SCADA ready with 4-20 mA and dry-contact signals, 220/380/480 V actuator supply. | None — purely manual lever and cover, no status signal to the control room. |
| Capital cost | Higher upfront cost for the actuator, controls and larger body envelope. | Lower purchase price, with the difference paid back in operating labour over the service life. |
Other Strainers and Screens
316L DUPLEX BASKET STRAINER
Continuous-flow duplex design. Quick-switch diverter valve. Investment cast 316L body. Perforated screen 0.5-6mm.
VIEW 316L DUPLEX BASKET STRAINERSPECIFICATIONS →WEDGE WIRE SCREEN ELEMENT
Vee-wire profile welded to support rods. High open area for maximum flow. Non-clogging for high-solids streams.
VIEW WEDGE WIRE SCREEN ELEMENTSPECIFICATIONS →HIGH PRESSURE Y-STRAINER
Forged body for high pressure applications. Integral seat design. Blow-down connection for in-line cleaning.
VIEW HIGH PRESSURE Y-STRAINERSPECIFICATIONS →