The Water Strainer is a mechanical filtration component installed directly into piping networks. Its core function is to physically capture and remove unwanted solid particles, rust, debris, and suspended sediment from liquid streams.
Product Specifications
|
Item |
Specification |
|
Size |
1/2"–4" (DN15–DN100) |
|
Connection |
NPT, BSP, ANSI 150, DIN PN16 |
|
Working Pressure |
Up to 20 bar |
|
Filtration |
20–200 Mesh (840–74 μm) |
|
Compatible Media |
Water, seawater, oil, diesel, mild chemicals |
|
Body & Screen |
Silica sol cast body, SS304/SS316 screen |
|
Maintenance |
Quick-clean cover, reusable screen |
Construction Specs & Materials
Strainer Body
Cast SS316 (CF8M) or WCB housing rated to ASME Class 150/300 and PN16–PN40 standards.
01
Filter Screen
SS316 mesh (40–200 mesh / 400–74µm) preventing particulate fouling in downstream pumps and valves.
02
Bolted Cover
Top-entry access with optional quick-release swing bolts for fast element cleaning without piping removal.
03
Seals & Gaskets
PTFE (up to 180°C) or EPDM (up to 120°C) for chemical and hot water compatibility.
04
End Connections & Drain
Flanged (ANSI B16.5 / DIN EN 1092-1) or threaded (NPT/BSP) ports with an NPT blow-down drain for inline flushing.
05
Typical Applications
Centrifugal Pump Suction Lines
Installed upstream of pumps handling raw water, cooling fluids, and slurry media.
Agricultural Systems
Deployed in surface water pumping stations, drip networks, and filtration banks.
Chemical & Refining Pipelines
Fitted on heat exchanger inlets, control valve trains, and process fluid lines.
Marine Utilities
Integrated into raw seawater cooling circuits, bilge systems, and ballast water intake lines.
OEM & Custom Engineering
Casting Alloys: ASTM A351 CF8 (SS304), CF8M (SS316), and Duplex Stainless Steel options.
Filter Elements & Seals: AISI 304/316 mesh (40 to 200 mesh) with EPDM, Viton/FKM, or PTFE seals for zero-leakage media compatibility.
Dimensional Customization: Custom face-to-face dimensions, wall thickness, and end connections (NPT, BSPT, ANSI, DIN, JIS flanges).
OEM & Branding Services: Reverse engineering via 2D/3D CAD from physical samples, custom tooling, cast-in logos, and laser etching.
Testing
Silica Sol Investment Casting
Precise wall thickness control and smooth internal flow passages to minimize pressure drop.
Spectrographic PMI Verification
Optical Emission Spectrometry (OES) testing on every heat lot to confirm exact Cr/Ni/Mo chemistry.
Hydrostatic Shell Testing
100% pressure tested per API 598 standards before final packaging.
Certified Traceability
EN 10204 3.1 Material Test Reports (MTRs) provided with every shipment batch.
Commercial Terms
MOQ: Standard sizes from 100 pcs; custom OEM projects from 50 to 200 pcs depending on weight.
Lead Times: Working samples in 15–20 days; mass production ships within 30 to 45 days after deposit.
Delivery Terms: Tiered volume rates under FOB (Shanghai/Ningbo), CIF, or DDP terms.
Export Packaging: Sealed polybags, heavy-duty cartons, and ISPM 15-compliant fumigated plywood pallets.
Payment Terms: T/T (30% deposit, 70% against B/L copy) or 100% irrevocable L/C at sight.
12-Month Quality Warranty: Full coverage against casting porosity, structural defects, and dimensional non-conformance.
FAQ
Q: How does the 5-day express replacement policy work if the defect is discovered after the 12-month warranty period?
A: Claims after the 12-month warranty period are evaluated case-by-case against the original casting heat batch records, typically resulting in a discounted replacement.
Q: Is standard SS304 screen material suitable for long-term seawater cooling circuit use?
A: SS316 is strongly recommended for continuous seawater exposure due to its higher molybdenum content resisting chloride-induced pitting corrosion.
Q: What is the pressure drop difference between a 20-mesh and 200-mesh screen at the same flow rate?
A: At an equivalent 50 GPM flow rate through a 2" strainer, a 20-mesh screen typically shows a pressure drop of 0.3-0.5 PSI, while a 200-mesh screen shows 2-3 PSI due to the finer filtration area restriction.
Q: Can one water strainer handle different types of liquids?
A: Yes, provided the body material, screen material, and seal material are compatible with the medium.
Q: What happens if a batch fails hydrostatic shell testing or PMI verification after arrival at the destination port?
A: Buyers must submit a claim with test evidence within 15 days of port arrival, after which a credit note or free replacement is issued within 10 business days upon verification.
