For biopharmaceutical processes, install a Y-type strainer (threaded) directly after feed pumps to protect sterilizing-grade filters from coarse particles. Select SS304 or SS316L construction with 20-35 mesh screen to remove debris ≥500 microns from water and oil-based media. This sanitary filter reduces membrane filter load by 60-80% and extends service life. Position the strainer before 0.2-0.45μm sterilizing filters to prevent premature fouling. Threaded connections (NPT or BSP) allow rapid installation without welding.

Process Protection Requirements

Downstream sterilizing-grade filters operate at fine micron ratings and cannot tolerate large particulates. Without pre-filtration, these filters clog rapidly, raising costs and causing downtime.

Protection provided by sanitary strainers:

Captures particles ≥500 microns (depending on mesh)
Reduces sterilizing filter load by 60-80%
Extends membrane filter service life
Lowers total filtration cost per batch

The sanitary y strainer is installed as a pre-filter at the point where particulate load is highest. This configuration preserves downstream filter integrity and maintains production throughput.

Design and Operational Principle

The Y-type strainer features a body with an angled branch containing a perforated screen. Fluid enters the main path, passes through the screen, and exits while captured particles collect in the branch chamber.

Key specifications:

Body material: SS304 or SS316L
Connection: Threaded (NPT or BSP)
Screen options: 20, 35, or 100 mesh
Media compatibility: Water and oil-based fluids
Temperature range: -20°C to 135°C

The sanitary filtration process requires smooth internal surfaces. The strainer interior is electropolished to Ra ≤ 0.4μm, preventing bacterial adhesion. The removable screen allows cleaning without replacing the entire strainer.

Application Points in Biopharmaceutical Lines

Y-type strainers are specified at strategic process locations for both aqueous and oil-containing streams.

Typical installation points:

Raw material transfer lines
Media preparation feed lines
CIP supply return loops
WFI distribution systems
Oil-based lubricant or hydraulic fluid lines

The sanitary strainer removes weld slag, gasket fragments, or debris introduced during maintenance. This protection extends to heat exchangers, valves, and control instruments downstream.

Material Selection and Media Compatibility

The strainer is fabricated from SS304 or SS316L stainless steel. SS304 suits water-based media. SS316L provides enhanced corrosion resistance for oil-based fluids, aggressive CIP chemicals, and chloride-containing streams.

Body: SS304 or SS316L
Screen element: 304 or 316 stainless steel
Surface finish: Electropolished (Ra ≤ 0.4μm)
Gasket: EPDM, PTFE, or NBR (FDA‑compliant)
Media: Water and oil compatible

Threaded connections enable rapid installation without welding, simplifying maintenance. The sanitary filters stainless steel construction supports full CIP and SIP protocols.

Screen Selection and Maintenance

Mesh size depends on the particle size that downstream equipment can tolerate. A 20‑mesh screen captures particles >850μm for raw media. A 35‑mesh screen (500μm) is specified for finer protection.

Typical mesh options: 20, 35, 100
Cleaning method: Remove element and rinse
Inspection interval: Based on differential pressure

Selection Table

Specification	Typical Value
Body material	SS304 or SS316L
Connection	Threaded (NPT or BSP)
Size range	0.5" – 4" (DN15 – DN100)
Surface finish	Ra ≤ 0.4μm (electropolished)
Screen options	20, 35, 100 mesh
Media	Water, oil, bioprocess fluids
Temperature range	-20°C to 135°C
Standards	3A, EHEDG, FDA

Installation and Maintenance

Threaded connections allow installation using PTFE tape or pipe sealant. The Y‑branch should orient downward for debris collection. Proper thread engagement ensures leak‑free joints.

Monitor differential pressure across the screen. When pressure drop increases by 5‑10 psi, clean the screen. Remove the cover, extract the screen, rinse with cleaning solution, and reinstall. The screen is reusable with proper care.

Why specify the Y-type strainer:

Removes particles ≥500 microns, protecting sterilizing filters.
Reduces membrane filter load by 60‑80%, lowering costs.
Offers threaded connections for tool‑free installation.
Supports SS304/SS316L options for water or oil media.
Provides reusable screens with simple maintenance.

The Y-type strainer is a component for biopharmaceutical filtration systems. Its design removes particulates, protecting downstream sterilizing filters and process equipment. Specify this strainer with appropriate mesh, material, and threaded connections to match process requirements. The sanitary filtration system's reliability depends on this first defense layer, ensuring consistent product quality and reduced maintenance costs.

Sanitary Stainless Steel Welding Y-Type Strainer

Our Sanitary Stainless Steel Strainer including Sanitary Straight Strainer, Sanitary Y type Filter, Hygienic Butt Weld Filter, Sanitary Clamped Strainer, Sanitary Thread Male Filter.
Filters are widely usde in the auxiliary service for food processing, cosmetic, chenicals and paharmacy industries. Due to its hygienic design, it is maunly used to filter the particulates that destroy pumps and some other equipments.
The filter consists of inlet and outlet housing,inner screen mesh to filter the particlates and impurities which can`t pass the mesh.

Product Description

Product Name:	Sanitary Stainless Steel Welding Y-Type Strainer
Type:	1"-4" or DN25-DN100
Material:	SS304 SS316L
Head Code:	Round
Technics:	Forged
Mesh:	30 - 165
Useful Surface:	15% - 52.6%
Filters:	Metal Mesh, Perforated Plate And Wedge Wire
Packaging:	carton box or plywood case