Donkin Series 555 Cast Iron Gate Valves PN7
Flanged Ends with replaceable stem seal. GIS/V7:Part 1
Andy Hatton
National Sales Manager – Gas
Flanged Gate Valve to GIS/V7:Part 1. Pressure range: 7 Bar (100 PSIG). Temperature range: -10°C to +100°C
The Series 555/300-002 Softseal valve is a double-faced, resilient seat, internal screw, clear bore wedge gate valve. It is designed primarily for the isolation of sewage gas and wet/dirty gases. Manufactured and approved to specification GIS/V7:Part 1
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 555/300-002 | |
|---|---|
| Connection: | Flanged |
| Material: | Cast Iron |
| DN: | DN80 - DN300 |
| PN: | PN 7 |
| Closing direction: | Clockwise to Close |
Features
- Stem seals replaceable with valve in situe
- Full double block and bleed with pressure relieving plug
- Soft seal positive shut off, metal to metal secondary seal
- Maintenance free
- 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 end of line service
- Integral lifting lugs on all sizes
- EN1092 PN16 flanges
- Embodied carbon data available upon request.
- Options:
- Pressure point/by-pass bosses cast into the valve as standard, can be drilled and plugged to suit customer requirements
- Viton 'O' Rings
- Alternative flange drillings
- Also available in ductile iron, steel and with factory fitted PE tails
- The Softseal range are also manufactured in ductile iron, steel and with P.E. tails.
Downloads
Reference nos. and dimensions:
| Ref. no. | BR DN |
DN mm |
H mm |
H3 mm |
L mm |
W mm |
Turns to open |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|
| 555-080-33-010380 | RP0.5 | 80 | 296 | 396 | 203 | 188 | 13 | 23 |
| 555-100-33-010380 | RP0.5 | 100 | 334 | 444 | 229 | 220 | 15.5 | 28 |
| 555-150-33-010380 | RP0.75 | 150 | 446 | 589 | 267 | 294 | 15 | 62 |
| 555-200-33-010380 | RP0.75 | 200 | 529 | 699 | 292 | 349 | 19.5 | 90 |
| 555-250-33-010380 | RP0.75 | 250 | 665 | 868 | 330 | 441 | 25 | 182 |
| 555-300-33-010380 | RP0.75 | 300 | 730 | 960 | 356 | 517 | 27 | 228 |
Components
| 1. | Body | Cast iron GJL-250 |
| 2. | Bonnet | Cast iron GJL-250 |
| 3. | Wedge | Cast iron GJL-250 |
| 4. | Spindle | Stainless Steel 1.4305 (303) |
| 5. | Pressure relief plug | Steel 11SMn30 (EN1A) |
| 6. | Seals | Viton |
| 7. | Fastenings | Steel gr. 8.8, zinc plated |
Test/Approvals
- Tested according to EN12266-1
- 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 according to EN 558 Table 2 Basic Series 3
- Standard flange drilling to EN1092 (ISO 7005-2), PN 16
