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Adjustable choke are the chokes that include restrictions or orifices to control the flow rate of fluids.These choke are not ntended to be used as shutoff valves. Adjustable Chokes have an externally controlled variable area orifice coupled with an orifice area indicating mechanism. Actuators can be used for driving mechanism |
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Material Specification |
| All Body, Bonnet and END & Outlet Connections shall be fabricated from
the material which shall conform to the anufacturers Written
Specifications which shall include minimum requirement for: |
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Tensile Strength
Yield Strength
Hardness
Impact Strength
Elongation
Impact Strength |
: 483 to 655 Mpa
: 248 to 517 Mpa
: 56 HRB to 92 HRB
: 15 Ft. lbf
: 15% Minimum
: 20% Reduction of area (Minimum ) |
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| Performance Requirement |
| Operating cycle requirement for chokes has got two performance requirement levels: |
| - Performance Requirement Level 1 has got 3 operating cycle |
| - Performance Requirement Level 2 has got 200 operating cycle |
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| Pressure & Temperature Rating |
| Pressure & temperature rating shall be as per API-6A from 13.8 MPa (2000 psi) to 138.0 MPa [20000 psi]. |
| The temperature rating is classified as K,L,N,P,S,T,U,V with minimum -60deg centigrade to 121 centigrade. |
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| Material Class |
The material class has got various services for general & sour service from AA,BB,CC,DD,EE,FF,HH. The minimum material requirement for body, bonnet, end & outlet connections with respect to pressure controlling parts, stems & mandrel hangers |
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| Size |
Reliable Valves manufactures the adjustable choke for 2  |
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api-6A |
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- ISO 9001: 2008 by Det Norske Veritas A.S.
- Fire Safe (API 607) by Det Norske Veritas A S
- Fire Safe (API 6FA) by Det Norske Veritas A S
- PED Certificate by DNV A.S.
- ATEX Certificate by DNV A.S.
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