REW Signature Product · STR Series
Pipeline Strainers
Y-Type · Basket Type · T-Type · 15mm – 900mm
Essential pipeline protection devices that remove solid particles and debris from flowing fluids. Protects downstream equipment including pumps, valves, meters, and instruments from damage and clogging.
Size Range
15mm to 900mm
Pressure Class
PN10 – PN40
Standards
BS 1868 · API 600
Body Material
CI · CS · SS
ISO 9001:2015 Certified
BS 1868 · API 600 · DIN 3202
100% Pressure Tested
Since 1948 · Lahore, Pakistan
79+ Years of Valve Engineering
ISO 9001:2015 Certified
BS 1868 · API 600 · DIN 3202
100% Pressure Tested
Since 1948 · Lahore, Pakistan
79+ Years of Valve Engineering
CROSS-SECTION · 01
Product Overview
The Guardian of Pipeline Integrity
Strainers are essential mechanical devices used to remove solid particles and debris from flowing liquids and gases. They protect downstream equipment such as pumps, valves, meters, and instruments from damage, clogging, and wear.
REW manufactures strainers in Cast Iron, Cast Steel, and Stainless Steel with perforated SS filters, available up to 36" (900mm) diameter. Available in Y-Type, Basket Type, and T-Type configurations for diverse industrial applications.
Equipment Protection
Protects pumps, valves, and instruments from debris damage
Low Pressure Drop
Minimal flow restriction with optimized perforated screen design
Easy Maintenance
Removable screen/basket for easy cleaning and maintenance
Multi-Material
Available in CI, CS, SS with SS perforated filters
Product Variants
Three Core Configurations
Each engineered for specific filtration requirements — from high-pressure steam to high-capacity water filtration.
STR-Y
Type 01
Y-Type Strainer
Compact Y-shaped body design ideal for high-pressure applications. Can be installed in horizontal or vertical pipelines.
The perforated screen is easily accessible through the bottom cover for cleaning.
Compact Y-shape for high pressure service
Horizontal or vertical installation
Perforated SS screen for debris removal
Easy access cover for screen cleaning
Size: 15mm – 900mm (½" – 36")
Pressure: PN10 – PN40 / Class 150 – 300
Material: CI, CS, SS
Standard: BS 1868, API 600
Primary Applications
High Pressure
Steam Lines
Oil & Gas
Chemical
STR-B
Type 02
Basket Strainer
Cylindrical body with removable basket screen for high dirt holding capacity. Designed for horizontal installation only.
Ideal for applications requiring frequent screen cleaning and high flow rates.
High dirt holding capacity basket
Horizontal installation only
Easy basket removal for cleaning
High flow rate capability
Size: 50mm – 900mm (2" – 36")
Pressure: PN10 – PN25 / Class 150
Material: CI, CS, SS
Standard: BS 1868, API 600
Primary Applications
Water Treatment
High Flow
Municipal
Irrigation
STR-T
Type 03
T-Type Strainer
T-shaped body design similar to Y-type but with different body geometry. Compact design for general purpose filtration
applications with low pressure drop requirements.
Compact T-shape body design
General purpose filtration
Low pressure drop design
Easy maintenance access
Size: 15mm – 600mm (½" – 24")
Pressure: PN10 – PN25 / Class 150
Material: CI, CS, SS
Standard: BS 1868, API 600
Primary Applications
General Purpose
Water Systems
HVAC
Light Industrial
STR-TMP
Type 04
Temporary Strainer
Cone or plate type temporary strainers used during pipeline startup to protect downstream equipment from construction debris.
Removed after system commissioning.
Cone or plate type design
Startup protection for new pipelines
Removed after system commissioning
Protects pumps and instruments
Size: 50mm – 900mm (2" – 36")
Pressure: PN10 – PN25 / Class 150
Material: MS, SS
Standard: BS 1868, API 600
Primary Applications
Pipeline Startup
Construction
Commissioning
Temporary Use
Manufacturing Process
Watch Our Production Line
From raw casting to final pressure testing — witness seven decades of valve engineering mastery in motion.
REW Strainer Manufacturing
From casting to final testing — complete production process
VIDEO LINK PLACEHOLDER — Replace with your video URL
<iframe src="YOUR_VIDEO_URL_HERE" width="100%" height="100%" frameborder="0" allowfullscreen></iframe>
Applications
Serving 40+ Industries
REW strainers protect Pakistan's most critical pipeline infrastructure — from water utilities to sugar mills.
01
Water Supply
WASA, KWSB, municipal distribution, treatment plants
02
Hydropower
WAPDA projects, penstocks, turbine protection
HVAC
Chilled water, heating circuits, cooling towers
04
Chemical
SS strainers for corrosive media, acid, alkali service
05
Sugar Mills
Juice heaters, process lines, condensate return
06
Oil & Gas
Refineries, pipelines, OGDCL, PPL, PARCO terminals
07
Power Generation
Hydro, thermal — WAPDA, K-Electric, NEPRA
08
Mining
Slurry lines, dewatering, mineral processing
09
Food Processing
Sanitary lines, CIP systems, steam sterilization
10
Textile
Dyeing, steam distribution, process water
11
Fire Protection
Hydrant systems, sprinkler mains, fire water storage
12
Wastewater
Sewage treatment, effluent handling, sludge lines
Working Principle
Filtration Process
Step-by-step operation sequence of a REW pipeline strainer — from fluid entry to debris removal.
01
Fluid Entry
Fluid enters the strainer body through the inlet port. The fluid passes through the perforated screen or basket.
02
Filtration
Solid particles and debris are trapped by the perforated screen while clean fluid passes through to the outlet.
03
Debris Accumulation
Debris accumulates in the screen/basket over time, gradually increasing pressure drop across the strainer.
04
Cleaning & Maintenance
When pressure drop increases, the cover is removed and the screen/basket is cleaned or replaced. System is then restarted.
CROSS-SECTION VIEW
Construction Details
Every Component Engineered
Detailed breakdown of each major component — function, material, and engineering importance.
Body
Primary pressure-containing component. Cast in CI, CS or SS. Houses the screen/basket and flow passage.
Cover / Cap
Covers the screen/basket chamber. Bolted or screwed design for easy access during cleaning and maintenance.
Perforated Screen
Stainless steel perforated screen or basket that traps debris. Available in various mesh sizes per application requirements.
Gasket
Compressed asbestos-free, spiral wound or PTFE gasket between body and cover. Ensures pressure integrity.
Bolts & Nuts
B7/2H carbon steel or SS 304/316 bolts secure the cover to body. Torqued to specification for leak-free joint.
Drain Plug
Optional drain plug at the bottom of the strainer body for draining and cleaning purposes.
Technical Specifications
The Engineering Ledger
Complete specification sheet for REW Strainers — every dimension, material, and standard documented for your engineering team.
Strainer · Full Specification
DOC · STR-SPEC-2026
| Product Name | Strainer — Y-Type, Basket Type, T-Type, Temporary |
|---|---|
| Size Range | 15 mm (½") to 900 mm (36") |
| Pressure Rating | PN10, PN16, PN25, PN40 · Class 125, 150, 300 |
| Body Material | Cast Iron (GG25), Carbon Steel (WCB/WCC), Stainless Steel (CF8/CF8M) |
| Screen / Basket | Stainless Steel 304, SS316 — perforated as per requirement |
| Gasket | Compressed Non-Asbestos, Spiral Wound SS+Graphite, PTFE |
| Bolts / Nuts | B7 / 2H Carbon Steel, SS 304/316 |
| End Connection | Flanged (EN 1092-2, ANSI B16.5) / Threaded (BSP/NPT) |
| Operating Temp | -10°C to +200°C (depending on material) |
| Design Standards | BS 1868, API 600, DIN 3202 |
| Face-to-Face | BS 1868, API 600, DIN 3202 |
| Flange Standard | BS 4504, ANSI B16.5, DIN 2501, EN 1092 |
| Testing Standard | API 598, ISO 5208 — Hydrostatic Shell Test |
| Coating / Paint | Epoxy Coated (250 microns DFT), Fusion Bonded Epoxy |
| Applications | Water, Steam, Oil, Gas, Chemicals — Industrial and Commercial |
| Certification | ISO 9001:2015 · ISO 14001:2015 · ISO 45001:2018 · PSQCA |
| Origin | Manufactured in Lahore, Pakistan — Since 1948 |
Engineering Standards
Compliance & Certifications
Every REW strainer is manufactured and tested to internationally recognized standards.
BS 1868
British Standard
Steel check valves and strainers. Primary design standard for REW strainers in industrial service.
API 600
American Petroleum Institute
Steel gate, globe and check valves. Covers design and testing for petroleum industry service applications.
DIN 3202
German Standard
Face-to-face dimensions for valves. Ensures dimensional interchangeability with European manufacturers.
ISO 5208
International Standard
Industrial valves — Pressure testing of metallic valves. Harmonized international testing protocol.
API 598
Valve Testing
Standard testing procedures for all valve types. Shell test at 1.5× working pressure.
BS 4504
Flange Standard
Circular flanges for pipes, valves and fittings. PN designated. Covers bolt patterns and dimensions.
ANSI B16.5
American Flange Standard
Pipe flanges and flanged fittings. Class 125, 150, 300 ratings for American market compliance.
EN 1092
European Flange Standard
Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, PN designated.
ISO 9001:2015
Quality Management
Quality management system certified by TÜV Austria. Every valve traceable from raw material to final test.
Pressure Ratings
Working & Test Pressures
Pressure-temperature ratings for REW strainers across all standard pressure classes.
| Pressure Class | Working Pressure (bar) | Shell Test (bar) | Temperature Limit |
|---|---|---|---|
| PN10 | 10 | 15 | -10°C to +120°C |
| PN16 | 16 | 24 | -10°C to +200°C |
| PN25 | 25 | 37.5 | -10°C to +200°C |
| PN40 | 40 | 60 | -10°C to +200°C |
| Class 125 | 14.5 | 21.8 | -10°C to +200°C |
| Class 150 | 19.6 | 29.4 | -10°C to +200°C |
| Class 300 | 50 | 75 | -10°C to +200°C |
Dimensional Information
Size & Weight Data
Select a size to view detailed dimensional data for Y-Type strainers. All dimensions in millimeters.
DN50
DN100
DN150
DN200
DN300
DN400
DN600
Nominal Size (DN)50 mm
Face-to-Face (L)203 mm
Height (H)165 mm
Flange Diameter165 mm
Bolt Circle125 mm
No. of Bolts4
Bolt DiameterØ19 mm
Weight (approx.)12 kg
The Forge
Forged with 79 Years of Mastery
From raw casting to final pressure testing — every REW strainer passes through a rigorous manufacturing process refined over seven decades at our Lahore facility.
01
Pattern & Casting
Precision wooden/metal patterns, green-sand and shell-mould casting in CI, CS, SS
02
CNC Machining
CNC lathes and VMCs for seat, bore, flange and body machining to precise tolerances
03
Screen Perforation
Stainless steel screen perforated to required mesh size. Basket formed and welded as required
04
Assembly
Screen/basket installed in body. Cover fitted with gasket and bolts torqued to specification
05
Pressure Testing
Shell test at 1.5× working pressure — per API 598 / BS 1868
06
Painting & Dispatch
Epoxy coating (250 microns DFT), marking, documentation pack with test certificate
FACILITY · LHR
CNC Machining · Lahore Plant
Quality Assurance
Zero-Defect Philosophy
Every strainer undergoes rigorous inspection and testing before dispatch. Our quality system is certified to ISO 9001:2015 by TÜV Austria.
Incoming Inspection
Raw material verification — chemical composition and mechanical properties per EN 10204 3.1
Dimensional Inspection
CMM and precision instruments verify all critical dimensions against approved drawings
Hydrostatic Shell Test
1.5× working pressure held for specified duration. No visible leakage permitted
Screen Inspection
Screen perforation size and pattern verified. Basket weld integrity checked
Visual Inspection
Surface finish, casting defects, machining quality, assembly integrity
Coating Inspection
DFT measurement, adhesion test, holiday detection for epoxy coatings
Identification Marking
Size, pressure class, material grade, manufacturer logo — permanently marked
Documentation
Test certificates, dimensional reports, painting certificates — complete traceability
QA LAB · LHR
Technical Resources
Download Documentation
Complete technical documentation for engineering, procurement, and installation teams.
Technical Datasheet
Complete specifications, materials, dimensions, and performance data for all strainer variants.
Download →
Product Catalogue
Full REW product range with technical data, applications, and ordering information.
Download →
Installation Manual
Step-by-step installation guide, orientation requirements, and commissioning procedures.
Download →
Maintenance Manual
Preventive maintenance schedules, screen cleaning, and overhaul procedures.
Download →
CAD Drawings
2D and 3D CAD files in DWG, STEP, and IGES formats for integration into your designs.
Download →
Certificates
ISO 9001, ISO 14001, ISO 45001, PSQCA, and type approval certificates.
Download →
Test Reports
Sample hydrostatic test reports, material test certificates, and inspection records.
Download →
Selection Guide
Technical guide for selecting the right strainer type and size for your application.
Download →
Installed Projects
Trusted Across Pakistan
REW strainers installed in critical infrastructure projects nationwide.
Water Supply
Lahore Water Treatment Plant
Lahore, Punjab
120+
Strainers Installed
DN50-300
Size Range
2024
Completion
Oil & Gas
PARCO Oil Terminal Expansion
Mahmood Kot, Punjab
85+
Strainers Supplied
PN25
Pressure Class
2025
Phase 2
Power Generation
Muzaffargarh Power Station
Muzaffargarh, Punjab
65+
Strainers Installed
PN40
Pressure Class
2025
Completed
Sugar Mills
Chashma Sugar Mill Expansion
Mianwali, Punjab
95+
Strainers Installed
DN50-200
Size Range
2026
Ongoing
Technical FAQ
Engineering Questions
Answers to the most common technical questions about REW strainers.
What is the difference between Y-type and Basket strainers?+
Y-type strainers have a Y-shaped body and can be installed in horizontal or vertical pipelines. They are compact and suitable for high-pressure applications. Basket strainers have a cylindrical body with a removable basket screen and are designed for horizontal installation only. They offer higher dirt holding capacity and are easier to clean.
What mesh sizes are available for strainer screens?+
REW offers perforated screens in various mesh sizes from 0.5mm to 6mm perforation diameter. The mesh size is selected based on the size of particles to be removed and the flow rate requirements of the application.
How often should strainers be cleaned?+
Cleaning frequency depends on the amount of debris in the fluid and the mesh size. Generally, strainers should be inspected and cleaned when the pressure drop across the strainer increases significantly. Regular monitoring of pressure drop is recommended.
What is the difference between temporary and permanent strainers?+
Temporary strainers (cone or plate type) are used during pipeline startup to protect downstream equipment from construction debris. They are removed after system commissioning. Permanent strainers (Y-type, Basket type) remain in the pipeline for continuous filtration.
Can strainers be installed vertically?+
Y-type strainers can be installed in horizontal or vertical pipelines. Basket strainers are designed for horizontal installation only. For vertical installation, the flow must be downward through the basket.
What body materials are available?+
Standard body materials include Cast Iron (GG25), Carbon Steel (WCB/WCC), and Stainless Steel (CF8/CF8M). Screens are available in SS304 and SS316. Gaskets are available in compressed non-asbestos, spiral wound, and PTFE.
What standards do REW strainers comply with?+
REW strainers are manufactured to BS 1868 and API 600 standards. Face-to-face dimensions follow BS 1868, API 600 and DIN 3202. Flanges conform to BS 4504, ANSI B16.5, DIN 2501 and EN 1092. Testing is per API 598 and ISO 5208.
What is the pressure testing procedure for REW strainers?+
Every strainer undergoes: (1) Shell test at 1.5× working pressure for specified duration — no visible leakage permitted. All tests are documented with test certificates provided with every shipment.
Can REW manufacture custom-sized strainers?+
Yes. REW can manufacture strainers in custom sizes from DN15 to DN900, custom pressure classes, special materials, and custom mesh sizes. Custom drawings are typically delivered within 48 hours of specification confirmation.
What is the typical lead time for strainer orders?+
Standard sizes (DN50-DN300): 2-4 weeks. Large sizes (DN350-DN600): 4-6 weeks. Special sizes or exotic materials: 6-10 weeks. Emergency orders can be expedited. Exact lead times confirmed at time of quotation based on current production schedule.
What coating options are available?+
Standard coating is fusion-bonded epoxy (FBE) in blue or green, 250 microns DFT. Options include: bitumen coating for underground service, hot-dip galvanizing, bare finish, and custom RAL colors. Special coatings available for corrosive environments.
What documentation is provided with each shipment?+
Standard documentation includes: Material Test Certificate (MTC) per EN 10204 3.1, Hydrostatic Test Report, Dimensional Inspection Report, Painting/Coating Certificate, Certificate of Compliance, and Installation/Maintenance Manual.
What is the warranty period for REW strainers?+
Standard warranty is 12 months from date of commissioning or 18 months from date of shipment, whichever occurs first. Warranty covers manufacturing defects in materials and workmanship. Extended warranty available on request for critical applications.
How do I select the correct strainer type?+
Selection depends on: (1) Pipeline orientation — Y-type for horizontal/vertical, Basket for horizontal only, (2) Pressure class — Y-type for high pressure, (3) Dirt load — Basket type for high dirt load, (4) Mesh size — based on particle size to be removed. Our technical team provides free selection guidance.
How do I request a quotation for strainers?+
Submit your requirements via the quote form on this page, email rewpak@yahoo.com, or call +92 322 276 2222. Include: size, pressure class, material, type (Y/Basket/T-Type/Temporary), mesh size, end connection, quantity, and application details. Technical team responds within 24 hours.
Related Products
Complete Your Pipeline Solution
Explore the full REW product range — engineered to work together as a complete flow control system.
ISO 9001:2015
Quality Management · TÜV Austria
ISO 14001:2015
Environmental Management
ISO 45001:2018
Health & Safety Management
PSQCA Mark
Pakistan Standards Certified
Request a Quote
Specify Your Strainer Requirement
Share your size, pressure class, material, type (Y/Basket/T-Type/Temporary) and quantity — our technical team will respond with specifications, lead time, and competitive pricing within 24 hours.
Quick Quote Request