Strainer Valves

Strainer valves are essential in preventing solid particulates from reaching sensitive downstream equipment such as pumps, flow regulators, and instrumentation. Effective isolation of suspended solids is achieved through precision-engineered mesh or perforated elements capable of handling differential pressures up to 40 bar across varying viscosity ranges. This reduces cavitation risk and mitigates mechanical wear in rotary and reciprocating systems operating under continuous or batch flow regimes.

Valve Type

Globe or Y-type valve designed for straining and flow control in pipelines.

Flow Regulation Method

Manual or automatic control via adjustable valve mechanism for precise flow regulation.

Differential Pressure Range

Operates efficiently within a 0.2 to 2.0 bar pressure difference range.

Hydraulic Authority Recommendation

Ideal hydraulic authority is between 0.5 and 1.0 for stable valve performance.

Valve Characteristic Curve

Linear or equal percentage curve to maintain consistent flow control response.

Product Description

System designers often face challenges with pressure loss across filtration components. Strainer valves are designed using CFD-validated geometries that promote streamlined fluid movement and minimize turbulence. Pressure drop values are maintained within ≤5% of system line pressure, depending on micron retention levels. Flow coefficients (Cv/Kv) are optimized based on Reynolds number-specific ranges, allowing integration without recalibration of process control loops.

Test Point Configuration

Equipped with dual test points for accurate differential pressure measurement.

Maximum Allowable Flow Velocity

Maximum flow velocity up to 4 m/s to prevent erosion and noise.

Leakage Class (per EN 12266-1)

Leakage rated as Class IV, ensuring minimal fluid loss under test conditions.

Body Material Options

Available in stainless steel, brass, and ductile iron for durability options.

Design Pressure Class

Designed for PN16 or PN25 pressure classes, suitable for moderate pressures.

Thermal Expansion Compatibility

Allows for thermal expansion without compromising valve sealing or operation.

Installation Sensitivity

Requires horizontal installation to maintain optimal straining and flow control.

Control Accuracy

Provides ±5% flow accuracy for precise system balancing and regulation.

Position Repeatability

Position repeatability within ±2% ensures reliable valve actuation consistency.

Technical Advantages

Applications involving aggressive media—such as chlorinated solvents, caustic alkalis, or high-temperature hydrocarbons—require strainer components constructed from NACE-compliant alloys. Selection includes 316L, Duplex 2205, Inconel, and Hastelloy C variants depending on chloride content, fluid pH, and temperature envelope. Wetted surfaces are passivated or coated as per ASTM A967 or equivalent to prevent microstructural degradation over time. Mechanical seals, gaskets, and fasteners are specified according to elastomer compatibility and thermal cycling tolerance.

Strainer valves are equipped with mesh inserts fabricated using sintered wire cloth or wedge wire technology with precision ratings from 10 microns to 3 mm, allowing selection based on upstream fluid loading and expected particulate size distribution. Back-flushable or drainable designs are offered for high-frequency service intervals. Designs support mean time to maintenance (MTTM) of less than 20 minutes with top-access or quick-release bolting mechanisms, contributing to reduced scheduled downtime in automated or remote pipeline environments.

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Industry Applications

Chemical Processing Plants

Isolates catalyst dust, polymer residues, and process byproducts from corrosive media to prevent clogging of precision flow control devices.

Pharmaceutical Manufacturing Systems

Screens micro particulates from purified water and solvent streams to protect sanitary valves, diaphragm pumps, and instrumentation sensors.

Water Treatment and Desalination

Captures biological matter, silt, and scale from intake and RO feed lines to prevent membrane fouling and pump impeller damage.

Food and Beverage Processing

Removes undissolved solids and processing residues from CIP circuits and syrup transfer lines to protect hygienic equipment and flow meters.

Pulp and Paper Industry

Filters bark particles, fiber slurries, and chemical residues to protect high-capacity circulation pumps and steam line valves.

Marine and Offshore Systems

Extracts seaweed, sand, and marine growth from seawater cooling and ballast lines to prevent heat exchanger fouling and valve blockage.

Full Compliance with Mechanical and Documentation Standards

All valves undergo 100% hydrostatic testing at 1.5x design pressure and pneumatic seat leakage testing as per API 598 or EN 12266-1 (Leakage Rate A). Welded components are subjected to NDT techniques such as RT, UT, or DPI based on project-specific ITPs. Certification packages include EN 10204 3.1 MTCs, PMI reports, dimensional inspection records, and pressure test charts. Units intended for sour gas environments are validated against NACE MR0175/ISO 15156 with hardness controls applied during heat treatment and machining stages.

Units are manufactured in multiple geometries including Y-pattern for horizontal installations with minimal footprint, T-type for bidirectional use, and basket-type for high-capacity vertical lines. Pressure class options cover ANSI 150 to 2500, DIN PN10 to PN160, and API 600 configurations. End connections are available in RF, RTJ, NPT, BSPT, or BW/SW formats with dimensional tolerances conforming to ASME B16.5 and B16.25. All face-to-face and centerline measurements are compliant with international standards such as ISO 5752 or API 594.

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Check all our Frequently Asked Question

How does Frigate ensure mesh integrity in high-pressure strainer valves?

Frigate uses multi-layer sintered wire mesh with reinforced edge welding to handle high differential pressures without deformation. The mesh is mechanically locked inside the housing to prevent bypass. Each unit is tested under simulated flow pressure conditions up to 1.5× rated value. This ensures long-term retention efficiency even in pulsating or surge-prone systems.

What type of welding techniques does Frigate use for strainer valve body joints?

Frigate applies TIG or orbital welding on stainless steel bodies to achieve full-penetration, low-defect joints. Weld seams are stress-relieved and subjected to radiographic or ultrasonic inspection as per project ITP. This prevents crack initiation under thermal fatigue or pressure cycling. All welds conform to ASME Section IX and meet NACE hardness limits if required.

How are Frigate strainers optimized for high-viscosity media?

Frigate uses custom-calculated mesh open area ratios and oversized body chambers to prevent excessive pressure drop. Flow simulations using CFD help validate pressure profile and particulate deposition zones. For highly viscous fluids, wedge wire inserts are preferred due to easier flow path maintenance. This design avoids clogging and ensures steady flow even at low velocities.

How does Frigate manage strainer valve material selection for corrosive services

Material selection is based on process fluid chemistry, temperature, and chloride content. Frigate provides Duplex, Super Duplex, Inconel, and Hastelloy options depending on corrosion index calculations. All wetted parts undergo PMI and optional ferrite content validation. Coatings or passivation are applied based on media compatibility and site specifications.

Can Frigate design strainers for vertical installation in limited space applications?

Yes, Frigate offers basket-type and custom inline strainers with vertical flow orientation and compact body design. CAD modeling ensures proper clearances for removal and servicing. Flow dynamics are validated to avoid dead zones and sediment re-entrainment. These configurations are ideal for skid-mounted or modular systems with height restrictions.

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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Strainer Valves

Valve Type

Flow Regulation Method

Differential Pressure Range

Hydraulic Authority Recommendation

Valve Characteristic Curve

Product Description

Test Point Configuration

Maximum Allowable Flow Velocity

Leakage Class (per EN 12266-1)

Body Material Options

Design Pressure Class

Thermal Expansion Compatibility

Installation Sensitivity

Control Accuracy

Position Repeatability

Technical Advantages

Let's Get Started

Industry Applications

Full Compliance with Mechanical and Documentation Standards

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Strainer Valves

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Strainer Valves

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