MNC Valves Ltd.
MNC Valves LimitedΒ manufactures duplex strainers designed for uninterrupted filtration, continuous process operation, higher dirt-handling capability, and reliable downstream equipment protection in critical industrial liquid service applications where shutdown during cleaning is not acceptable.
Continuous operation without complete line shutdown
Dual chamber design for alternate filtration and cleaning
Suitable for critical process and utility liquid systems
High dirt-holding capacity with maintenance flexibility
MNC Valves LimitedΒ offers duplex strainers for applications where continuous operation, uninterrupted flow, higher dirt retention, and easier maintenance flexibility are essential. Duplex strainers are widely used in critical industrial liquid systems where one filtration chamber must remain in service while the other is cleaned, inspected, or serviced.
These strainers are especially suitable for process plants, water systems, cooling circuits, marine service, chemical plants, and utility lines where stopping the system for cleaning is difficult, undesirable, or commercially costly.
AΒ duplex strainerΒ is a dual-chamber filtration system consisting of two separate strainer baskets or screen chambers connected through a changeover or diverting valve arrangement. It allows one chamber to remain online while the second chamber is isolated for basket cleaning or maintenance.
Unlike standard single basket strainers, a duplex strainer enables continuous process flow without shutting down the complete line during maintenance. This makes it highly valuable in critical service applications where process interruption is unacceptable.
Process fluid enters the duplex strainer system and is directed into one active basket chamber. The basket traps suspended solids while the cleaned fluid exits downstream. When the active basket becomes loaded with debris, the operator diverts flow to the second chamber without interrupting the line.
Once flow is shifted to the standby chamber, the first chamber can be isolated, opened, cleaned, inspected, and returned to ready condition. This alternating operation enables uninterrupted filtration service in continuous-duty applications.
Two separate chambers allow one basket to operate while the other is cleaned, delivering uninterrupted filtration performance.
Integrated switching arrangement directs the flow from one chamber to the other during maintenance without stopping the full line.
Duplex design supports larger dirt load management in demanding industrial liquid service applications.
Uses a manually operated plug arrangement for changing flow from one chamber to another.
Uses ball valve arrangement for switching and isolation between the two strainer chambers.
Custom-built duplex systems for large flow rates, special applications, and project-specific industrial requirements.
Duplex Strainer
DN 50 to DN 1000 or higher depending on design
PN10 / PN16 / PN25 / Class 150 / 300 depending on type
CI / WCB / CF8 / CF8M / fabricated steel options
SS304 / SS316 basket and mesh options
Flanged
Basket screen / perforated basket / mesh-lined basket
Water / Oil / Chemicals / Process Fluids / Utility Liquids
Plug type / ball valve type / custom diverting arrangement
Hydro testing / applicable industrial inspection requirements
Used in cooling water, utility liquid, and continuous-duty systems where shutdown during cleaning is undesirable.
Suitable for uninterrupted filtration in utility and process liquid applications.
Used in critical process lines requiring continuous filtration and equipment protection.
Applicable in continuous water service where filtration maintenance must not stop the full process line.
Used in engine cooling and utility circuits where continuous straining is essential for equipment reliability.
Highly suitable in 24/7 production environments where maintenance shutdown has major operational cos.
Β
Operation
Continuous filtration without full shutdown
Cleaning generally requires line shutdown
Application Criticality
High / critical process service
General industrial liquid service
Maintenance Flexibility
Very high
Moderate
Capital Cost
Higher
Lower
Best Use
Continuous-duty systems
Normal maintenance-shutdown systems
Industrial understanding built through long market and application exposure.
Selection support for suitable strainer type, mesh, body material, and service condition.
Designed to protect equipment, reduce downtime, and improve pipeline system efficiency.
ContactΒ MNC Valves LimitedΒ for technical support, basket sizing guidance, and quotation for your uninterrupted filtration and continuous-process protection requirement.
Continuous-flow guidance
Basket sizing support
Project quotation support
Business-ready follow-up
A duplex strainer is used for continuous filtration in systems where the process cannot be fully shut down for basket cleaning.
The main advantage is uninterrupted flow because one chamber can operate while the other is cleaned or serviced.
It is commonly used in power plants, chemical plants, marine systems, water treatment, oil and gas utilities, and continuous industrial processes.
Basket strainers usually require line shutdown for cleaning, while duplex strainers allow alternate chamber operation without stopping the process.
Duplex strainers are generally used in liquid service such as water, oil, chemicals, and industrial process fluids.
Depending on design, changeover operation can be manual or integrated into more advanced automated arrangements.
SS304 and SS316 basket screens are commonly used depending on media and corrosion conditions.
Pressure drop rises when the active basket becomes clogged with debris and requires switching and cleaning.
CI, WCB, CF8, CF8M, and fabricated steel constructions are commonly used depending on application and size.
Because MNC Valves Limited provides technical selection support, continuous-filtration guidance, and duplex strainer solutions suitable for critical industrial and process applications.