Gate Valve – WSAA Appraisal
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Technical Information
Applications
Clover resilient seat polyethylene restraint gate valves are suitable for use in pressure and non-pressure water supply and sewerage applications.
Gate valves are used to isolate flow within pipeline sections, pipeline equipment and offtakes.
Typical applications include;
- Potable and recycled water supply
- Irrigation and raw water
- Gravity and sewer rising mains
- Fire systems
- Stormwater and drainage
- Buried and above ground
Gate valves should not be used for the purposes of throttling or adjusting flow.
Features and Benefits
| Features | Benefits |
| Fully restrained socket end connection for polyethylene pipe | Reduces/removes the need for traditional thrust restraint. |
| Fast and simple installation | No requirement for polyethylene welding, reducing installation time and cost. Valves can be simply installed under all-weather conditions. |
| 10-year manufacturers’ warranty | Confidence of the highest quality valves, backed by a 10-year manufacturer’s warranty. |
| Factory tested | Each gate valve undergoes hydrostatic pressure and operating torque testing |
| Reduced weight design | Safer and easier installation |
| Mechanical joint design | Removes the need for traditional polyethylene jointing methods of stub/maxi flanges or shouldered couplings. |
| Full bore design | Eliminates debris build up |
| Local inventory available | Fast and flexible supply to meet project demands |
| Manufactured to comply with AS/NZS2638.2 | Guaranteed quality products |
| Thermally bonded polymeric coating | Long-term corrosion resistance and performance |
Compliance
- WSA PS 281 “Gate Valves, Resilient Seated with Restrained Flexible Joints for Polyethylene Pipe in Pressure Applications – Drinking Water, Non-Drinking Water Supply and Sewerage”
- AS/NZS2638.2 “Gate valves for waterworks purposes – Resilient seated”
- AS/NZS4158 “Thermal-bonded polymeric coatings on valves and fittings for water industry purposes”
- AS1646 “Elastomeric seals for waterworks purposes”
- AS1831 “Ductile cast iron”
- EN12842 “Ductile iron fittings for PVC-U or PE piping systems. Requirements and test methods”
- AS/NZS4130 “Polyethylene (PE) pipes for pressure applications”
- AS/NZS4020 “Testing of products for use in contact with drinking water”
- ISO5211 “Industrial Valves – Part-turn actuator attachments”
WSAA Product Appraisal
Clover resilient seat polyethylene restraint gate valves are independently appraised and recommended by the Water Services Association of Australia (WSAA);
- Product Appraisal 11/21
WSAA Purchase Specification
Clover resilient seat polyethylene restraint gate valves comply with the requirements of the following Water Services Association of Australia (WSAA) purchase specification(s);
- WSA PS281 – Gate Valves, Resilient Seated with Restrained Flexible Joints for Polyethylene Pipe in Pressure Applications – Drinking Water Supply and Sewerage
Suitability for Use with Potable Water (AS/NZS4020 Compliance)
Clover resilient seat polyethylene restraint gate valves are suitable for potable water applications and comply with the requirements of AS/NZS4020 “Testing of products for use in contact with drinking water”.
Diameter Range
Clover resilient seat polyethylene restraint gate valves are manufactured with nominal diameters ranging from DN90 to DN315.
For gate valves with alternative diameters please contact Clover for additional technical and pricing information.
Pressure
Clover resilient seat polyethylene restraint gate valves are manufactured with a standard nominal pressure range of PN16 (1,600kPa).
Coating
Clover resilient seat polyethylene restraint valves are manufactured with a thermally bonded polymeric coating using a fluidised bed process in accordance with the requirements of AS/NZS4158 “Thermal-bonded polymeric coatings on valves and fittings for water industry purposes”.
| Specifications | Sym | Units | DN90 | DN125 | DN180 | DN250 | DN280 | DN315 |
| Length (Face to Face) | L | mm | 245 | 260 | 355 | 420 | 450 | 460 |
| Height (Centre to Keycap) | H | mm | 290 | 340 | 450 | 644 | 644 | 684 |
| Socket Depth | S | mm | 88 | 88 | 118 | 146 | 156 | 165 |
| Weight of Unit (Keycap Fitted) | Kg | 13 | 19 | 33 | 96 | 104 | 132 | |
| Turns to Close (approx) | Turns | 17 | 21 | 32 | 42 | 42 | 51 | |
| Actual Torque to Seal (approx) | Nm | 55 | 60 | 110 | 200 | 200 | 250 | |
| Maximum Operating Torque | MOT | Nm | 75 | 100 | 150 | 250 | 250 | 300 |
| ISO5211 Top Mounting Flange | F10 | F10 | F10 | F14 | F14 | F14 | ||
| Product Code (Anti-Clockwise Close) | VGGG090 | VGGG125 | VGGG180 | VGGG250 | VGGG280 | VGGG315 | ||
| Product Code (Clockwise Close) | VGGG090C | VGGG125C | VGGG180C | VGGG250C | VGGG280C | VGGG315C |
| Item | Part Name | Material | Standard/Grade |
| 1 | Body | Ductile Iron/Polymeric Coating | AS1831 500-7/AS4158 |
| 2 | Wedge | Ductile Iron (EPDM Encapsulated) | AS1831 500-7/AS1646 EPDM |
| 3 | Stem Nut | Copper Alloy (Dezincification Resistant) | AS1568 C48600 |
| 4 | Spindle | Stainless Steel | ASTM A276/431 |
| 5 | Body Gasket | EPDM Elastomer | AS1646/EPDM |
| 6 | Bonnet | Ductile Iron/Polymeric Coating | AS1831 500-7/AS4158 |
| 7 | Body Bolt | Stainless Steel | ASTM A276/316 |
| 8 | Thrust Washer | POM | |
| 9 | Thrust Collar | POM | |
| 10 | Bonnet Bolt | Stainless Steel | ASTM A276/316 |
| 11 | O’Ring | NBR Elastomer | AS1646/NBR |
| 12 | Seal Kit | NBR Elastomer | AS1646/NBR |
| 13 | Dust Cover | EPDM Elastomer | AS1646/EPDM |
| 14 | Seal Retainer Housing | Stainless Steel | ASTM A276/316 |
| 15 | Spindle Key Cap | Ductile Iron | AS1831 500-7 |
| 16 | Seal Ring | EPDM Elastomer | AS1646/EPDM |
| 17 | Restraint Ring | Copper Alloy (Dezincification Resistant) | AS1568 C37710 |
| 18 | Fixed Ring | Ductile Iron/Polymeric Coating | AS1831 500-7/AS4158 |
| 19 | Ring Bolt | Stainless Steel | ASTM A276/316 |
End Connections
Clover resilient seat polyethylene restraint gate valves are manufactured with restrained flexible joint connections in accordance with EN12842 “Ductile iron fittings for PVC-U or PE piping systems – Requirements and test methods”.
The polyethylene restrained flexible joints incorporate an elastomeric seal and copper alloy tensile restraint ring (optional 316 stainless steel is also available). Sealing and joint anchoring is achieved by bolting a ductile iron gland ring onto the body of the valve.
Flexible joint seals are manufactured as EPDM complying with AS1646 “Elastomeric seals for waterworks purposes”.
Pipe stiffener inserts are recommended for PE100 pipes ≥ SDR 17, i.e. PN10 or less.
Pressure
| Nominal Pressure (PN) | Allowable Operating Pressure (AOP) | Maximum Allowable Operating Pressure (MAOP) | Allowable Site Test Pressure (ASTP) | Production Test – Body | Production Test – Seat |
| 16 | 1,600 kPa | 1,920 kPa | 2,000 kPa | 2,400 kPa | 1,760 kPa |
Maximum Operating Temperature
40°
Options & Accessories
Clover resilient seat polyethylene restraint gate valves have a range of options and accessories available including:
- Anti-clockwise and clockwise closing models available
- Handwheel
- Gearbox Operator (Spur & Bevel)
- ISO5211 Top Mounting Flange
- Lilac coloured key-cap available for recycled water applications
- 316 Stainless steel tensile restraint ring
Contact Clover for further information.
Mechanical Properties – Ductile Iron
| Property | Value & Unit |
| Ultimate tensile strength (Minimum) | 500MPa |
| Elongation (Minimum) | 7% |
| Density (Specific Gravity) | 7.1 |
Mechanical Properties - Coating
| Property | Value & Unit |
| Internal Surface (in contact with drinking water) | 350 Microns |
| External Surface | 300 Microns |
Installation Training
Clover’s in-house engineering team provides a range of training, accreditation and technical support services.
The Clover Academy installation training course provides installers with important information relating to the correct handling, installation, testing, maintenance and repair of Clover pipe systems and products.
Contact the Clover engineering team to discuss scheduling a training program.
Technical Support
Clover’s in-house engineering team combines specialist technical knowledge, creative thinking and on-the-job experience, to offer our clients a range of project planning and consultation services.
From recommendations on product innovations, to crafting complex end-to-end solutions, our collaborative approach bridges the gap between contractors, authorities and suppliers. The only Australian provider able to offer clients the full product suite, Clover offers unbiased, strategic insights that always consider the bigger picture.
From initial planning, to onsite training and technical assistance, we offer input across every stage of your project’s timeline. Our contribution continues beyond the project design, and we remain accessible for ongoing changes and developments over the course of each project.
We work with contractors, asset managers, local councils and government, developers and other pipeline professionals to specify bespoke product solutions. By engaging our team of engineers, you gain access to unparalleled product knowledge and expertise.
Recommended Specifications
- Gate valves shall be Clover resilient seated non-rising spindle type with polyethylene (PE) restraint joint end connections conforming to WSA PS 281
- Gate valves shall close in an anti-clockwise / clockwise direction
- Gate valves shall be fitted with a keycap / handwheel
- Gate valve allowable operating pressure shall be 1,600kPa
- Protective coatings of gate valves shall be thermally applied polymeric type in accordance with AS/NZS4158
- Polyethylene restrained joints shall be fitted with a Grade C37710 Copper Alloy Tensile Restraint Ring / 316 Stainless Steel Tensile Restraint Ring
Technical Documents
Resilient Seat Polyethylene Restraint PN16 – Technical Data Sheet
PDF, 256.0K
Gate Valves and Accessories – Product Brochure
PDF, 1.0M