AVK Donkin Softseal Gate Valve
Flanged PN16, Hyrdrogen Approved
AVK UK
Gas & Water Sales
Ductile iron flanged gas gate valve Kitemark approved to GIS/V7-1. Temperature -10°C to +60°C. MOP 7bar
The Series 555/405 Softseal Valve is a double-faced, resilient seat, internal screw, clear bore wedge gate valve. It is designed primarily for the isolation of >98% hydrogen gas.
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 555/405-003 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile Iron |
| DN: | DN50 - DN300 |
| PN: | PN 10 |
| Closing direction: | Clockwise to Close |
Features
- Full double block and bleed facility 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. Integral lifting lugs on valves 20kg+
- Fasteners fully encapsulated and sealed with hot melt
- Profiled ‘O’ ring body/bonnet joint
- Clear bore for under pressure drilling and tapping operations. Suitable for end of line service
- Stainless steel spindle
- Embodied carbon data available upon request
- 25mm stem fitted as standard. Stem seal replaceable under pressure
- >98% hydrogen ready
Downloads
Reference nos. and dimensions:
| Ref. no. | DN mm |
BR DN |
H3 mm |
H mm |
L mm |
W mm |
Turns to open |
Theoretical weight/kg |
|---|---|---|---|---|---|---|---|---|
| 555-050-04-015703 | 50 | Rp1/2 | 326 | 259 | 178 | 152 | 9 | 12 |
| 555-080-04-015703 | 80 | Rp1/2 | 407 | 317 | 203 | 190 | 12.5 | 21 |
| 555-100-04-015703 | 100 | Rp1/2 | 445 | 340 | 229 | 229 | 15.5 | 26 |
| 555-150-04-015703 | 150 | Rp3/4 | 561 | 428 | 267 | 279 | 14.5 | 45 |
| 555-200-04-015703 | 200 | Rp3/4 | 678 | 516 | 292 | 343 | 20 | 69 |
| 555-250-04-015703 | 250 | Rp3/4 | 837 | 641 | 330 | 442 | 24 | 127 |
| 555-300-04-015703 | 300 | Rp3/4 | 995 | 724 | 356 | 483 | 28 | 165 |
Components
| 1. | Bonnet | Ductile iron GJS-500-7 |
| 2. | Wedge | Ductile iron GJS-450-10 |
| 3. | Gland | Ductile iron GJS-500-7 |
| 4. | Spindle | Stainless steel |
| 5. | Seal | NBR rubber |
| 6. | Bush | POM |
| 7. | Thrust collar | Brass CZ132 |
| 8. | Screw | Steel 8.8 |
| 9. | Screw | Steel 8.8 |
| 10. | Seal | NBR rubber |
| 11. | Wiper ring | NBR rubber |
| 12. | Seal | NBR rubber |
| 13. | Body | Ductile iron GJS-500-7 |
| 14. | Pressure relief plug | Steel |
| 15. | Seal | NBR rubber |
| 16. | Seal | NBR rubber |
Test/Approvals
-
Tested according to EN12266-1. Seat: 1.1 x PN (in Bar), Body: 1.5 x PN (in Bar)
- CE / UKCA marked according to Pressure Equipment Directive
- Made in Great Britain
- Approved according to Kitemark™ GIS/V7-1 (and PP1547 for hydrogen approved variants), KM 518241
Standards
- BGE/S/V/3, GIS/V7 Part 1, MSS SP-70
- Face to face according to EN 558 Table 2 Basic Series 3
- Standard flange drilling to EN1092 (ISO 7005-2), PN 16
