Key Features
- Full-Bore Flow Path: The ball opening aligns with the pipeline during fully open operation, reducing obstruction and hydraulic resistance. Actual pressure loss depends on valve size, flow rate and bore geometry.
- Quarter-Turn Operation: A 90-degree rotation moves the ball between its open and closed positions, providing convenient isolation of equipment and pipeline sections.
- Two-Piece Housing: The separate body sections allow access to the ball and seats during maintenance after safe isolation, depressurization and appropriate disassembly.
- PTFE Seating: Soft seat rings conform to the ball surface to establish the closing seal. Fluid cleanliness, temperature and seating-surface condition influence sealing performance.
- Flanged Connections: Raised-face ends provide detachable connections to compatible pipework. Published specifications reference EN 1983 for design, EN 558-1 for face-to-face dimensions and EN 1092 for end connections.
- Actuator Mounting Interface: An ISO 5211 top flange supports actuator integration. Actuator sizing should consider operating torque, differential pressure, cycling frequency and required closing time.
Materials and Construction
- Body and End Section: GGG40/GGG40.3 ductile iron forms the pressure-containing housing. The supplied grade should be confirmed in the order specification.
- Ball: Stainless steel provides the rotating closure element and seating surface.
- Stem: Stainless steel transfers operating torque to the ball.
- Seats: PTFE rings form the internal shut-off interface.
- Stem Packing: PTFE packing limits external leakage around the operating stem.
- Gland: GGG40/GGG40.3 ductile iron supports the packing arrangement.
Typical Applications
- Freshwater Distribution: Isolation of compatible water-supply branches, equipment connections and maintenance sections.
- Industrial Cooling Water: Shut-off around pumps, heat exchangers and cooling equipment where water chemistry and treatment additives suit the selected materials.
- Heating and Chilled-Water Circuits: Equipment and branch isolation within the confirmed temperature limits.
- Water Treatment Facilities: Compatible clean-water, treated-water and utility-water duties around filters and treatment equipment.
- Marine Auxiliary Systems: Selected shipboard freshwater and utility services, subject to project specifications and applicable classification requirements.
- General Industrial Utilities: Compatible air, gas and liquid services after confirmation of material suitability and operating limits.
Selection for Water Systems
Valve selection should consider the required flow rate and allowable pressure loss, using applicable Kv or Cv data where available. Assess maximum operating pressure, pump shut-off pressure and potential surges against the complete valve’s pressure–temperature limits.
Water-quality assessment should include pH, chloride content, suspended particles and treatment chemicals. Inhibitors, biocides and cleaning agents require compatibility checks at their actual concentrations and temperatures. Abrasive particles can damage the ball and seats.
Rapid closure can generate water hammer. Long pipelines and pumped systems may require controlled closing times and additional surge assessment. This valve is primarily intended for fully open or fully closed service; sustained throttling can accelerate soft-seat wear.
Drinking-water applications require confirmation that all wetted materials, coatings and seals meet the relevant approval requirements.
Corrosion Protection
Internal and external protection should be specified separately. Stainless steel internals do not protect exposed ductile iron surfaces, and PTFE seat rings do not form a complete body lining.
Where internal protection is required, a compatible coating system should be agreed before ordering, subject to availability for this model. Selection should account for immersion conditions, water chemistry, operating temperature and treatment chemicals.
External finishes should suit humidity, condensation, weathering and coastal exposure. Chilled-water installations also require appropriate insulation and vapour sealing.
Coating requirements should define surface preparation, coverage, dry-film thickness, curing and applicable inspection methods, including adhesion and pinhole testing where specified. Inspect surfaces after transport and installation, and repair damage using an approved procedure.
Seawater, brackish water and chemically aggressive services require a separate assessment of the complete valve construction and corrosion-protection system.
Compare Other Body Materials
Select the valve body material according to the operating fluid, pressure, temperature and corrosion conditions. Explore the following alternatives to the ductile iron version:
When comparing versions, confirm the complete valve specification, including seating materials, flange details, face-to-face dimensions and pressure–temperature limits.
