DONKIN SERIES 555 DUCTILE IRON GATE VALVE, PUR Coated
Flanged Ends, PN7
Andy Hatton
National Sales Manager – Gas
Flanged Gate Valve to GIS/V7:Part 1 Maximum Working Pressure: 7 Bar (100 PSIG) Temperature Range: -10°C to +60°C
The large diameter Series 555 Softseal Valve is a double-faced, resilient seat, internal screw, clear bore wedge gate valve. It is designed primarily for the isolation of natural gas and manufactured gas and comes with the new Donkin PUR coating system which allows the valve to be buried without further protection.
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 555/101-002 | |
---|---|
Connection: | Flanged |
Material: | Ductile Iron |
DN: | DN400 - DN600 |
PN: | PN 7 |
Closing direction: | Clockwise to Close |
Features
- High integrity coating for buried service. Maintenance free.
- Soft seal, positive shut off
- Full double block and bleed with pressure relieving plug
- Clear bore for under pressure drilling operations
- Metal to metal secondary seal
- “Flange feet” to aid installation and stockholding
- No lubrication required
- Double ‘O’ Ring stem seal
- Lifting lugs on all sizes
- Embodied Carbon Content available upon request.
- Options:
- Pressure point/by-pass bosses cast into the valve as standard. These can be drilled and plugged at our factory if required
- Alternative flange drilling
- Gear box
- Electric/pneumatic actuation
Downloads
Reference nos. and dimensions:
Ref. no. | DN mm |
H3 mm |
H mm |
HF mm |
BR DN |
L mm |
Turns to open |
Theoretical weight/kg |
---|---|---|---|---|---|---|---|---|
555-400-00-01133040 | 400 | 1196 | 864 | 927 | RP0.75 | 406 | 36 | 301 |
555-450-00-01133040 | 450 | 1337 | 947 | 1010 | RP0.75 | 432 | 40 | 340 |
555-600-00-01133040 | 600 | 1680 | 1189 | 1252 | RP0.75 | 508 | 52 | 745 |
555-600-00-01133052 | 600 | 1643 | 1215 | 1182 | RP0.75 | 508 | 52 | 745 |
Components
1. | Body and bonnet | Ductile iron GJS-450-10 |
2. | Stem | Stainless steel |
3. | Gate | Cast iron GJL-250 |
4. | Stem/seat seal | NBR rubber |
5. | Pressure relief plug | Steel 11SMn30 (EN1A) |
6. | Bonnet gasket | CNAF |
7. | Fasteners | Steel 8.8 |
Test/Approvals
- Tested according to EN12266-1
- Approved according to Kitemark™ GIS/V7-1, certificate KM 518241
- CE / UKCA marked according to Pressure Equipment Directive
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