BS5153 Swing Check Valve Resilient Seat PN16 Flange Type Check Valve

Working Pressure:16kg/cm²
Shell Test Pressure:24kg/cm²
Seat Test Pressure:18kg/cm²

Media:Water,Neutral Oil
Working Temperature:0-52°C 1

00％ Fusion Bonded Epoxy Coating for Inner and Outside Surface

Flange Drilled According to EN1092 PN10,PN16
Size:DN50--DN300

BS 5153 — The British Standard for Check Valves in Water Systems

BS 5153 is the definitive British Standard specification for cast iron check valves used in waterworks and general purposes. Originally published in 1974 and maintained through successive revisions, BS 5153 governs the design, materials, testing, and marking requirements for swing check valves deployed in UK water authority networks, Commonwealth municipal infrastructure, and any project worldwide that references British water industry standards in its technical specifications. When a tender document calls for a "check valve to BS 5153," the Model 2002 is the compliant answer — a ductile iron, resilient-seat, flanged swing check valve, PN16 rated, DN50–DN300, manufactured to BS 5153 design requirements with EN 1074-1/-3 testing.

The significance of BS 5153 in the global valve market cannot be overstated. In the UK, the standard is referenced by virtually every water company specification (Thames Water, Severn Trent, United Utilities, Yorkshire Water, Scottish Water, Welsh Water, Northern Ireland Water). Across Commonwealth nations — Nigeria, Kenya, Ghana, Tanzania, South Africa, Malaysia, Singapore, India, Pakistan, Bangladesh, Australia, New Zealand — BS 5153 remains the default check valve standard for public water supply projects, either directly or as the basis for national standards (e.g., SANS 5153 in South Africa). The Model 2002 is engineered to meet or exceed every structural, dimensional, and performance requirement of BS 5153, making it a specification-compliant choice for any BS-referenced water project anywhere in the world.

Product Overview

The Model 2002 is a BS 5153 swing check valve with resilient EPDM seat, PN16 rated, flanged ends to EN1092 PN10/PN16, available in sizes DN50 through DN300. The valve body and bonnet are cast from EN-GJS-500-7 (GGG50) ductile iron — a material upgrade over the gray cast iron commonly specified in BS 5153 — providing superior impact resistance, fatigue strength, and corrosion durability. The disc is fully encapsulated in EPDM and mates against a renewable EPDM seat ring, achieving a bubble-tight seal at 18 bar seat test pressure. The hinge assembly — SS304 swing arm and SS304 hinge pin — operates without lubrication and without corrosion for the full service life. Internal and external surfaces receive 100% fusion bonded epoxy coating at minimum 250 um DFT. Manufactured by Shandong Huaze Valve Co., Ltd. (ISO 9001, established 1998), each valve is factory hydro-tested to 24 bar shell, 18 bar seat.

Key Features

BS 5153 Compliant Design — Specification Confidence for Tender Compliance

In water infrastructure procurement, a referenced standard is often non-negotiable. BS 5153 appears in tender documents across the UK, the Commonwealth, and the Middle East as the minimum acceptable specification for swing check valves. The Model 2002 is designed, manufactured, and tested to meet BS 5153 requirements — it is not an "equivalent" or "alternative to" BS 5153, it is a BS 5153-compliant valve. For consulting engineers writing specifications, for contractors sourcing compliant materials, and for water utility procurement officers evaluating submissions, a BS 5153 check valve from an ISO 9001 manufacturer provides the documentation trail that auditing and commissioning require.

Resilient EPDM Seat — Zero Leakage, Silent Closure

The EPDM-encapsulated disc mates against a renewable EPDM seat ring, forming an elastomer-on-elastomer seal that achieves bubble-tight shutoff — zero leakage at 18 bar seat test pressure. This is the key advantage of resilient seat over metallic seat in BS 5153 valves: no trace leakage, no allowance for seepage, true zero backflow. For drinking water systems where backflow is a contamination risk, for pumped sewer rising mains where reverse flow carries solids that degrade a metallic seat, and for any application where "the check valve must not leak" is a contractual requirement, the resilient seat is the definitive choice. The EPDM encapsulation also absorbs closure impact energy, producing silent operation without the metallic "bang" of a metal-to-metal check valve.

Ductile Iron Body — Exceeds BS 5153 Material Requirements

BS 5153 traditionally references gray cast iron for body and bonnet castings — a material with excellent compressive strength but limited tensile strength and essentially zero elongation before fracture. The Model 2002 upgrades to EN-GJS-500-7 (GGG50) ductile iron: 500 MPa tensile, 320 MPa yield, 7% minimum elongation. This material choice provides a significant margin of safety over gray iron in pumped systems where surge pressures are always a possibility. Ductile iron absorbs transient pressure spikes through elastic deformation — it flexes and returns — rather than cracking. For water authority applications where a catastrophic body failure is a public health and safety event, the material upgrade from gray to ductile iron is a critical risk reduction.

Stainless Steel SS304 Hinge — Designed to Never Bind

The swing arm and hinge pin are both austenitic stainless steel 304 — a deliberate pairing that eliminates galvanic corrosion at the pivot. In a check valve, a seized hinge is a life-safety and asset-protection failure: if the disc cannot close, reverse flow is uncontrolled. The SS304 arm running on an SS304 pin — submerged in treated water for the valve's 20-30 year installed life — will move freely through tens of thousands of pump cycles without corrosion, without lubrication, and without maintenance intervention.

100% FBE Coating — Internal and External Protection

Fusion bonded epoxy at 250 um DFT minimum, electrostatically applied and oven-cured on every internal and external surface. Spark-tested at 3 kV for holiday detection. For check valves on standby pump lines that may sit idle and water-filled for months between cycles, internal FBE coating prevents the corrosion tuberculation that can physically obstruct disc movement — the most common cause of "check valve failed to close" in water utility asset surveys. The external FBE coating provides comparable protection against atmospheric corrosion in buried chamber or exposed above-ground installations.

EN1092 Flanges — Universal Pipework Compatibility

Flanges are drilled to EN1092 PN10/PN16 — the European and international standard for flange connections. This provides full compatibility with ductile iron pipe (to EN 545), steel pipe (to EN 10224), and PE pipe with stub flanges — the three most common pipe materials in water distribution and transmission networks. The EN1092 bolt pattern also matches ISO 7005-2, the international equivalent, ensuring compatibility with pipework systems specified to ISO standards.

Full-Bore Flow Path — Minimum Head Loss, Maximum Efficiency

In the fully open position, the swing disc clears the flow path entirely — the bore is unobstructed, and the valve presents effectively the same hydraulic resistance as a straight length of pipe. This full-bore design delivers the lowest head loss of any check valve type at a given size, reducing pumping energy consumption over the installed life. In continuously running pump stations with check valves on every pump discharge, the cumulative energy saving across all valves over 20 years is a measurable operational cost reduction.

BS 5153 Check Valve Range — Choose Your Seat

Materials of Construction

Technical Data

Where BS 5153 Resilient Seat Check Valves Are Specified

• UK Water Company Pumping Stations: BS 5153 is referenced in the specifications of every UK water and sewerage company. The resilient seat variant (Model 2002) is the standard choice for clean water booster stations, service reservoir outlet valve chambers, and treated water distribution pump stations.
• Commonwealth Municipal Water Supply: Nigeria, Kenya, Ghana, Tanzania, Uganda, Zambia — across sub-Saharan Africa, BS 5153 remains the default specification for water infrastructure funded by development banks, bilateral aid, and national water authorities. The Model 2002 provides tender-compliant documentation with every shipment.
• Middle East Water Transmission: UAE, Saudi Arabia, Qatar, Oman, Kuwait — Gulf Cooperation Council countries frequently reference BS standards in their water infrastructure specifications, a legacy of British engineering consultancy involvement in early GCC water networks.
• Southeast Asia — Malaysia & Singapore: PUB Singapore and Air Selangor specifications routinely reference BS 5153 for check valves. The Model 2002 is factory-tested to EN 1074-1/-3 and supported with full material certification.
• Sewage Pumping Stations — Clean Water Side: For seal water systems, wash water lines, and clean water services within sewage pumping stations, where BS 5153 compliance is specified alongside the main sewage valves.
• Building Services — BS-Specified Projects: Commercial and institutional buildings where the MEP specification calls for BS 5153 check valves on domestic water booster pumps, fire pump discharges, and HVAC condenser water systems.
• Irrigation & Agriculture: Large-scale irrigation pump stations in Commonwealth countries referencing BS specifications. Resilient seat provides zero backflow protection for pump protection and water conservation.

Quality Assurance

• 100% Shell Hydrostatic Test — 24 bar, 60 sec, zero leakage — every valve
• 100% Seat Tightness Test — 18 bar, EN 1074-3, zero leakage — every valve
• 100% Disc Swing Test — Full travel, no binding, no sticking — every valve
• 100% FBE DFT Verification — min 250 um, all surfaces — every valve
• 100% Spark Test — 3 kV, holiday detection, full coated surface — every valve
• 100% Flange Dimensional Inspection — EN1092 PCD, bolt circle, thickness — every valve
• 100% EPDM Encapsulation Visual + Adhesion Check — every disc
• EN 10204 3.1 Material Certificates available on request
• BS 5153 Compliance Statement provided with order documentation

Ordering Information

About Shandong Huaze Valve Co., Ltd.

Established 1998 in Qingdao, China. ISO 9001 certified manufacturer with 100–200 employees, 300 containers annual production capacity, and USD 5–6 million annual turnover. Huaze manufactures a comprehensive range of pipeline valves for water, wastewater, irrigation, fire protection, building services, and industrial applications: Gate Valves (DIN 3352 / EN 558, BS 5163, SANS 664), Swing Check Valves (Resilient Seat DIN, Resilient Seat BS 5153, Metallic Seat BS 5153, Silent Metallic, Silent Resilient), Air Valves, Globe Valves, Flap Valves, Fire Hydrants, and Y Strainers. All products are individually factory-tested, coated, inspected, and shipped from Qingdao Port. Huaze exports to 30+ countries across Europe, the Middle East, Africa, Southeast Asia, and South America — with particular strength in Commonwealth and British-standard markets.