Industry Solutions

Water & Wastewater Filtration and Valve Solutions

BCST provides strainers, filters and solids-handling valves for municipal water, industrial wastewater, sludge and treatment-chemical systems. Our solutions help protect equipment, control debris, isolate slurry and support reliable plant maintenance.

  • Strainers for pumps, meters and process equipment
  • Automatic filters for continuous water systems
  • Knife gate valves for sludge and solids-bearing flow
  • Pinch valves with replaceable flexible sleeves
  • Slurry valves for abrasive treatment processes

Water and wastewater treatment plant

Remove Debris

Capture damaging solids before pumps, meters and treatment equipment.

Control Sludge

Select full-bore and low-cavity valves for solids-bearing flow.

Resist Wear

Match sleeves, seats and liners to abrasive process conditions.

Simplify Maintenance

Use accessible or replaceable components to reduce service time.

Product Portfolio

Products for Water, Sludge and Slurry Systems

Select each product according to the medium, particle characteristics, flow rate, pressure and maintenance requirements.

Pipeline strainer for water treatment

Crépine

Captures larger debris before it reaches pumps, meters, valves, nozzles and downstream equipment.

  • Filtre en Y
  • Basket strainer
  • Duplex strainer
  • Temporary strainer

View Strainers

Automatic filter for water system

Filter

Provides finer or continuous filtration where debris load and cleaning frequency exceed simple strainer duties.

  • Self-cleaning filter
  • Backwash filter
  • Basket filter
  • Project-specific filtration packages

View Filters

Knife gate valve for wastewater

Vanne à guillotine

A sliding gate cuts through solids-bearing media and provides compact isolation for sludge and wastewater lines.

  • Unidirectional or bidirectional options
  • Metal or resilient seating
  • Rising-stem configurations
  • Manual or automated operation

View Knife Gate Valves

Pinch valve for wastewater slurry

Valve à pincement

A flexible sleeve forms the process passage and isolates most mechanical components from the medium.

  • Full-bore flow path
  • Replaceable elastomer sleeve
  • Suitable for abrasive slurry
  • On-off or suitable control duties

View Pinch Valves

Slurry valve for wastewater treatment

Slurry Valve

Engineered for media containing abrasive solids, grit or mineral particles that can rapidly damage standard valve trim.

  • Wear-resistant internal components
  • Reduced-cavity construction
  • Replaceable seats and liners
  • Application-specific actuation

View Slurry Valves

Custom wastewater flow solution

Custom Flow Solution

Combined filtration and valve configurations for unusual debris loads, corrosive chemicals or restricted installation spaces.

  • Custom materials and connections
  • Automated cleaning options
  • Actuator and accessory packages
  • Project-specific documentation

Product Comparison

Match the Product to the Process Duty

Product Fonction principale Typical Media Avantage clé Critical Selection Data
Crépine Remove larger pipeline debris Raw water, process water and cooling water Simple equipment protection Flow rate, particle size and pressure drop
Automatic Filter Continuous or finer filtration Intake water, recycled water and utility water Reduced manual cleaning frequency Filtration rating, debris load and cleaning method
Vanne à guillotine Sludge and solids isolation Wastewater, sludge and fibrous media Compact body and cutting gate action Solids content, pressure and flow direction
Valve à pincement Isolation or suitable flow control Abrasive slurry and suspended solids Full-bore replaceable sleeve Sleeve compatibility and operating pressure
Slurry Valve Severe solids-handling service Grit, lime slurry and mineral-bearing wastewater Wear-resistant construction Particle hardness, velocity and pressure differential

Domaines d'application

Solutions Across the Treatment Process

Raw water intake filtration

Raw Water Intake

Strainers and filters remove leaves, fibers, scale and suspended debris before pumps and treatment equipment.

  • Pump-suction protection
  • Basket or duplex strainers
  • Automatic filtration options
Primary wastewater treatment

Primary Treatment

Knife gate and pinch valves isolate solids-bearing wastewater around screening, settling and transfer equipment.

  • Screening-system isolation
  • Settled-solids discharge
  • Grit-handling service
Valves for sludge handling

Sludge Handling

Low-cavity and full-bore valves reduce areas where thick sludge, fibers and solids can accumulate.

  • Sludge-pump isolation
  • Thickener discharge
  • Digester and dewatering lines
Water treatment chemical dosing system

Chemical Treatment

Material-compatible valves support lime, coagulant, disinfectant and pH-adjustment systems.

  • Corrosion-resistant materials
  • Lined valve options
  • Process-compatible sealing
Industrial wastewater slurry system

Industrial Wastewater

Wear-resistant valves handle abrasive wastewater generated by mining, power, steel and chemical processes.

  • Abrasive slurry isolation
  • Corrosive wastewater service
  • Replaceable wear components
Reclaimed water filtration system

Reclaimed and Utility Water

Filters protect spray nozzles, heat exchangers and utility systems using treated or recycled water.

  • Self-cleaning filtration
  • Backwash systems
  • Continuous-flow protection

Screen and Filter

Remove damaging debris before it reaches critical plant equipment.

Isolate and Control

Select valve geometry that matches sludge and slurry behavior.

Maintain and Renew

Use accessible screens and replaceable wear parts to simplify service.

Filtration Engineering

Selecting a Strainer or Filter

The correct filtration product protects downstream equipment without creating unacceptable pressure loss or excessive maintenance.

  1. Identify the equipment that requires protection.
  2. Determine the largest acceptable downstream particle size.
  3. Define the water flow rate and operating pressure.
  4. Estimate debris type, concentration and loading frequency.
  5. Calculate clean and dirty differential pressure.
  6. Confirm whether flow can stop during cleaning.
  7. Select manual, duplex, self-cleaning or backwash operation.
  8. Provide safe access for debris removal and maintenance.
Water filtration equipment selection

Filtration Options

Strainer and Filter Comparison

Equipment Type Typical Duty Cleaning Method Best Suited For
Y Strainer General pipeline protection Manual screen removal Compact utility and branch lines
Filtre à panier Higher debris-holding capacity Manual basket removal Pump suction and process-water lines
Duplex Strainer Continuous pipeline protection Chamber changeover and basket cleaning Systems that should remain in operation
Self-Cleaning Filter Recurring contamination Automatic cleaning cycle Continuous water and utility systems
Backwash Filter Suitable high-flow filtration Reverse-flow cleaning Installations with backwash and discharge provisions
Sludge and slurry valve selection

Valve Engineering

Selecting Valves for Sludge and Slurry

Sludge and slurry behave differently from clean water. Solids can settle, pack into cavities, abrade trim and prevent conventional seats from closing.

  • Define the solids percentage by weight or volume
  • Provide particle size, shape and hardness
  • Identify fibers, rags or stringy material
  • Confirm whether solids settle during shutdown
  • Review velocity and pressure differential
  • Select compatible seat, sleeve and liner materials
  • Avoid unnecessary cavities in the process passage
  • Size the actuator for deposits and closing resistance

Valve Comparison

Knife Gate, Pinch or Slurry Valve?

Selection Factor Vanne à guillotine Valve à pincement Slurry Valve
Flow passage Compact gate passage Full-bore flexible sleeve Application-specific low-cavity design
Typical media Sludge, fibers and suspended solids Abrasive slurry and thick media Grit, mineral slurry and severe solids
Primary wear component Seat and gate Replaceable sleeve Seat, liner and protected trim
Common duty On-off isolation On-off or suitable throttling Severe-service isolation or control
Main selection concern Flow direction and solids packing Sleeve compatibility and pressure Abrasion, velocity and pressure drop

Sélection des matériaux

Materials for Water and Wastewater Service

Body and Pressure Parts

  • Cast iron or ductile iron for suitable water duties
  • Carbon steel for industrial process systems
  • Stainless steel for corrosion resistance
  • Special alloy for aggressive chemical service

Seats, Sleeves and Liners

  • Natural rubber for suitable abrasive slurry
  • EPDM for compatible water and chemical service
  • NBR for suitable oil-bearing wastewater
  • Engineered elastomers for application-specific duties

Filter Elements and Trim

  • Stainless steel screens and baskets
  • Perforated or woven-mesh elements
  • Hardened trim for abrasive conditions
  • Ceramic protection for selected severe wear

Send Us Your Water or Slurry Data

Share the flow rate, pressure, temperature, solids content, particle size and required function. Our team will help identify a suitable filtration or valve solution.

Selection Checklist

Information Required for Engineering Review

Process Data

  • Raw water, wastewater, sludge or slurry type
  • Normal and maximum flow rate
  • Operating and design pressure
  • Operating and design temperature
  • Solids concentration
  • Particle size, shape and hardness
  • Fibrous or stringy material content
  • Chemical composition and pH

Equipment Requirements

  • Filtration, isolation or control function
  • Required filtration rating
  • Perte de charge admissible
  • Valve size and connection standard
  • Required shutoff performance
  • Operating frequency and cycle time
  • Manual or automated operation
  • Inspection and documentation requirements

Manufacturer Support

From Application Review to Delivery

1. Application Review

We evaluate the medium, solids, flow conditions and equipment function.

2. Product Selection

Product type, size, materials, filtration rating or valve trim are prepared for confirmation.

3. Inspection and Testing

Applicable material, dimensional, pressure and functional checks are completed.

4. Documentation

Approved drawings and agreed inspection records are prepared according to the order.

Inspection and Maintenance

Maintain Reliable Plant Operation

  • Monitor differential pressure across strainers and filters
  • Clean screens before excessive restriction develops
  • Inspect baskets for deformation, corrosion and damaged mesh
  • Flush settled solids from valve and pipeline low points
  • Inspect knife gate seats and gate surfaces for wear
  • Replace pinch-valve sleeves before external leakage occurs
  • Check slurry-valve liners, seats and protected trim
  • Verify actuator travel, accessories and fail action
Water treatment valve and filter maintenance

Questions fréquemment posées

Water & Wastewater FAQ

What is the difference between a strainer and a filter?

A strainer usually removes larger debris for equipment protection. A filter may provide finer separation or an automatic cleaning function, depending on the design.

Which strainer is suitable for continuous operation?

A duplex strainer may allow one chamber to remain in service while the other basket is cleaned. Automatic filters may also be considered for suitable applications.

How is the correct filtration rating selected?

The opening should retain particles that could damage downstream equipment while maintaining an acceptable clean and dirty pressure drop.

Why are knife gate valves used for wastewater?

The compact sliding gate can cut through suitable solids-bearing media and provides practical isolation for sludge, fibers and wastewater.

When should a pinch valve be selected?

A pinch valve is often considered when a full-bore passage and replaceable flexible sleeve are advantageous for abrasive slurry or suspended solids.

Can a pinch valve be used for flow control?

Selected pinch-valve designs can provide suitable throttling, but sleeve construction, operating pressure, control range and abrasion must be reviewed.

What makes a slurry valve wear resistant?

Wear resistance comes from suitable flow geometry, protected sealing surfaces and materials selected for particle hardness, velocity and impact conditions.

What information is required for a quotation?

Provide the medium, flow, pressure, temperature, solids concentration, particle data, required function, size, connection and actuator preference.