Double Block and Bleed Plug Valves
Microne Valves manufactures a comprehensive range of Double Block & Bleed (DBB) Plug Valves in sizes up to 42” (1050 mm), and in ASME classes from 150 to 600. The valves are offered in a combination of materials and actuation options to suit customer requirements.
The highly reliable valve has successfully completed over 10,000 cycles at its rated pressure.
Compliance Standards
DBB Plug Valves are designed in accordance with key international standards. They also meet the requirements of major hydrocarbon industry standards and customer specifications.
| Parameter | Standard |
| Design | API 6D/ ISO 14313 |
| Pressure-Temperature Rating | ASME B16.34 |
| Face-to-Face | ASME B16.10 from 2” to 18” Manufacturer standard for 20” and above |
| End Flanges | ASME B16.5, ASME B16.47-Series A |
| Actuator/ Gear Mounting Flange | ISO 5210 |
| Pressure Testing | API 6D |
| Fire Test | API 607/ ISO 10497 |
| Fugitive Emission | ISO 15848, Part 1 |
Materials of Construction
| Components | Materials |
| Body | ASTM A216 Gr WCC + ENP |
| Plug | ASTM A216 Gr WCC + ENP |
| Segment | ASTM A395 Gr 60-40-18 |
| Seal | Viton |
| Bonnet | ASTM A216 Gr WCC |
| Radial Bearing | Stainless Steel backed PTFE |
| Packing | Flexible graphite |
| O-Ring | Viton B |
| Drain Plug | SS 410 |
| Bottom Plate | ASTM A216 Gr WCC |
| Gasket | Flexible graphite |
| Gland Flange | ASTM A216 Gr WCB |
| Outer Stem | ASTM A479 Type 410 |
| Inner Stem | ASTM A479 Type 410 Condition 3 |
| Stud | ASTM A193 Gr B7 |
| Hex Nut | ASTM A194 Gr 2H |
| Cavity Pressure Relief System | SS 316 |
PRODUCT STANDARDS & SPECIFICATIONS
Valve Size
Valve Type
Pressure Class
End Connection
Bore
Pattern Type
Operator
Material
Operating Temperature
Leakage Class
Design Standard
Face to Face Standard
End Connection Standard
Test Standard
Fire Safe Standard
Certification
2″ – 36″
Lubricated
ANSI 150 / 300
RF
Full Bore / Reduced Bore
Short / Regular
HW / Gear / Actuator
Carbon Steel / Stainless Steel / Duplex / Alloy Steel
Standard / High
FCI 70-2 CLASS IV
ASME B16.34 / API 6D / ISO 14313
ASME B16.10
ASME B16.10
API 6D / API 598
API 607 / ISO 10497 / API 6FA
EN 10204 3.1 – 3.2 / 2014-68 EU-PED / SIL Capable / IP 67
