How to clean strainers for long life

Our strainers are designed for the continuous removal of entrained solids from liquids in pipeline systems. They are fit for applications that need constant flow, a key factor in plant operations. Our mesh strainers are available in various sizes and materials as per application requirement. They are used for straining cooling water from ponds, lakes or rivers, cooling towers, plan service water, boiler feed water, secondary effluent irrigation and municipal water intake for system protection.

The deciding factors are the extent of solids and the potential to handle the backwash discharge flow. They are significant investment in case of high loading or upset conditions.

The strainers also offer stress-free operations. Regular flow is provided even when the equipment is being backwashed, offering stable protection for pumps, valve, heat exchangers  and other functional systems. Rapid cleaning and servicing of manual strainers is expensive and is not properly done, serious disruptions to the whole piping system may occur. Our mesh strainers will considerably decrease the maintenance costs. They are fit replacements for simple or duplex strainers.

Characteristics

Our mesh strainers are made in accordance with ASME sections and codes.

They prevent any leakage so the strainer remains dry as well as clean in service without leakage of process media down the sides of the strainer.

Unitized modular assembly, the motor, gear reducer, cover and full internal operating mechanism lift off as a unit, making all components easily accessible. It widely simplifies maintenance and decreases costs.

A small part of system flow used during backwash.

Common Strainer mesh can be woven wire or perforated mesh.

Applications of Monel mesh screens are:

·         For coarse straining applications like raw water intakes from pond, streams, perforated elements offer good performance and at economical price.

·         In applications where pre-screening of the fluid is done however fine filtration of the fluids is required, the sintered mesh elements can be chosen.

·         In applications where the fluid to be strained contains fibrous materials, wedge screen elements will reduce the impact of the fibers to the screen.

Cleaning the strainer

·         Cleaning the strainer is performed by using pressure differential among line pressure and atmosphere. During the cleaning cycle, when the backwash valve is opened to atmosphere, a part of the strained fluid reverses flow back across the isolated part of element, lifts off the debris and removes it from the strainer.

·         Sticky or greasy debris are hard to backwash and may need longer backwash cycle durations. Sand, pipe scale backwash easily. The magnitude of debris released from the strainer can also cause a trouble. Make sure that the volume of suspended solids doesn’t increase from the value of 0.02%. If your process needs heavier loading, contact our engineers.

·         The magnitude of fluid needed to clean a straining element is based on the type and magnitude of debris. In normal conditions, around 5% of the line flow will be used for cleaning of straining element during cleaning process.