Microne Industries
Products > Butterfly Valves
Features & Benefits
  • Design Standard – API 609, BS 5155, DIN 3202, IS 13095.
  • Body: Single Piece
  • End Connection: Flanged, Wafer, Lug.
  • DN : 2” – 48”
  • PN : 1.0MPa , 1.6MPa, ANSI 125, ANSI 150.
  • Disc: Concentric, Single offset, Double offset, Triple offset.
  • Leak proof – Positive shut-off.
  • Phenolic Backed Seat.
  • One piece thru’ Shaft.
  • Operation: Manual, Mechanical actuator, Electric actuator, Pneumatic actuator.
  • Extended Stem.
  • End to end dimensions as per API609, BS5155, DIN3202, and IS13095.
  • Actuator Mounting – ISO 5211
  • Material: NACE MR-0175
  • Test in accordance with API-598.
The principle of operation incorporated in the MICRONE triple offset valve is geometry in motion. Both the seat in the body and the seal on the disc are surfaces of a cone which is sectioned at an angle. The valve shaft is located slightly to one side of the seat center and above the plane of the seat.

Its center of rotation is also somewhat is also somewhat offset from the axis of the imaginary cone which extends from the surface of the seat. When the valve is closed, the surface of the seal and the seat are in full contact at all points. Any efforts to try to further close the disc (rotating it into the seat) increases the sealing force and tightens the valve. This allows the valve to achieve a bi-directional seal.

Opening the valve, or rotating the disc away from its seat, results in the seal moving away from the seat at all points, eliminating rubbing or sliding of the seating surfaces, thus avoiding wear. MICRONE valves feature true non-rubbing seating surfaces for long life and tight shutoff.
  • ASME B16.34
  • ASME Section III
  • GL 89-10 (NRC Generic Letter) Actuator Sizing
  • GL 96-05 Periodic Verification Testing
  • ASME QME-1 Mechanical
  • Flanged
  • Lugged
  • Wafer
  • Butt Weld end (end to end dimensions for BW valves can vary based on customer requirements)
  • Special End to End requirements
Available Patterns
Triple Offset Sealing System

Offset # 1: The shaft is offset from the seat plane providing an uninterrupted seating surface.

Offset # 2: Centerline of disc is offset from the centerline of the shaft allowing the seal to freely lift off any away from the seat on opening.

Offset # 3: The cone axis is offset from the centerline of the seal to provide a conical sealing surface that allows the seal to rotate in and out of the seat without interface sliding or jamming.

Additional Options
  • Oxygen clean wrap
  • Steam traced shaft
  • Weld-on steam jacket
  • Bolt-on steam jacket
  • NACE MR 0175 & 103 compliant
  • Heat extension bonnet
  • Cryogenic extension bonnet
  • Remote position indication
  • Stem instrumentation
  • Baseline diagnostic testing
  • Live loaded packing
  • Purge port and lantern ring
  • Stellite seat overlay
Valve Design
Flange Design
Butt Weld Design
Face to Face
ASME B16.34. API 609, ASME Sec III NC, ND (Nuclear)
ASME B16.5, B16.47
ASME B16.25
ASME B16.10
ASME B16.34, API 598, API 607
Butterfly Valves Explore view
1 Body HASTELLOY , 6A, 5A, 4A,NAB, AL-BRZ, CF8M, CF3M, 17-4PH, CA6NM, C12A, 
2 Disc LCC, LCB, WCC, WCB, INCONEL, NO6625, NO7718, NO8825, NO8926, 
3 Clamp Ring F51, F53, F60, F316, F316L, F6A, 416, 4140, LF2, A105
4 Seal Stack Graphite & 316
4.1 Seal Gasket Graphite
5 Cap Screw B8/ B8m
6 Lock Washer 316
8 Cover Plate WCB, WCC, LCB, LCC, CF3, CF8, CF3M,CF8M, 4A, 5A, CK3MCUN , MONEL
9 Cover Plate Gasket Graphite
10 Cap Screw B8/ B8m
12 Annular Key S21800
13 Bearing Carbon Graphite
16 Shaft A564 630 H1150M, F316, F51, F53,N06615, N06625, N07718, N08825, N08926, 17-4PH
17 Spring Pin SST
18 Parallel Key 316
19.1 Wiper Ring Graphite
19.2 Packing Ring Graphite
20 Gland Follower SS 416
21 Stud B8
22 Hex Nut B8M
33 Actuator Key S21800
34 BRG Protector Graphite
36 Gland Plate WCB, WCC, LCB, LCC, CF3, CF8, CF3M,CF8M, 4A, 5A, CK3MCUN , MONEL
37 Retainer Ring SS 302
38 Spacer Ring SS 316
Quick Contact
N0.117, Sidco Industrial Estate,
Pattaravakkam Railway Station Road
Chennai - 600 098, Tamil Nadu, India.
P: +91 44 6527 0487
F: +91 44 4504 8163
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Mail: info@microneind.com
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