Donkin Series 555 Steel Gate Valve
Flanged Ends. GIS/V7:Part 1

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Flanged Gate Valve to GIS/V7:Part 1 Temperature range: -20°C to +60°C. Maximum Working Pressure: PN16 rated to 16 bar, ASA Class 150 rated to 19 Bar. 7 Bar Double block and bleed
The Series 555S Steel Softseal Valve is a double-faced, resilient seat, internal screw, clear bore wedge gate valve. Designed primarily for the isolation of high pressure natural gas, fitting into steel pipelines.
The Donkin 555 softseal gas valves are manufactured with the tried and trusted Donkin metallic wedge used for over 50 years on the gas networks. A true wedge design, the gate seals on both machined faces with an embedded nitrile seal in each face which sit completely outside the flow of gas with the valve open.
• The design gives effective and long term sealing on closure and the closing torques remain relatively low over the valve’s design life.
• The low closing / breaking torque means operators don’t risk over exertion / injury. Can be easily closed by a single person with standard equipment.
• Negates the need for manual handling risk assessment.
Variant 555/303-001 | |
---|---|
Connection: | Flanged |
Material: | Cast Steel |
DN: | DN200 - DN300 |
PN: | PN 16 |
Closing direction: | Clockwise to Close |
Features
- Full double block and bleed facility with pressure relieving plug
- Clear bore
- Soft seal positive shut off, metal to metal secondary seal
- Maintenance free and fitted integral lifting lugs on all sizes
- Self supporting “flange feet” for ease of installation and stockholding
- Fasteners fully encapsulated with hot melt
- Profiled ‘O’ ring body/bonnet joint
- Suitable for under pressure drilling and tapping operations
- Suitable for above or below ground use and end of line service
- DN50mm available - refer to 555/103.
- Embodied carbon content available upon request.
- Option for pressure point/by-pass bosses cast into the valve as standard, can be drilled and plugged to suit customer requirements
- Alternative flange drillings and weld end connections
- Option of Viton ‘O’ rings option and stainless steel spindle
Downloads
Reference nos. and dimensions:
AVK ref. no. | DN mm |
H mm |
H3 mm |
L mm |
Turns to open |
Theoretical weight/kg |
---|---|---|---|---|---|---|
555-200-03-013 | 200 | 480 | 652 | 292 | 19.5 | 87 |
555-250-03-013 | 250 | 607 | 810 | 330 | 24 | 152 |
555-300-03-013 | 300 | 697 | 941 | 356 | 28 | 300 |
Components
1. | Body | Cast steel GP240GH+N |
2. | Bonnet | Cast steel GP240GH+N |
3. | Gland | Cast steel GP240GH+N |
4. | Wedge | Ductile iron GJS-450-10 |
5. | Spindle | Steel 11SMn30 (EN1A) |
6. | Seals | NBR rubber |
7. | Fastenings | Steel gr. 8.8 |
Test/Approvals
- Tested according to EN 12266-1
- Approved according to Kitemark™ GIS/V7-1, certificate KM 518241
- Made in Great Britain
- CE marked according to Pressure Equipment Directive
- UKCA marked according to Pressure Equipment Regulations
Standards
- GIS/V7 Part 1
- Face-to-face dimension according to EN 558, Series 3
- Flange drilling to EN1092-1 / ISO 7005-1, PN 16



