Contact Information

Address: Kamanwala Chambers, 4th Floor, Sir P. M. Road, Fort, Mumbai, Maharashtra, India, 400 001
Country: [India]
Phone: - - 91-22-67477900
Mobile: -
Fax: - - 91-22-67477901
home products Pressure &Amp; Vacuum Breather Valves

Pressure &Amp; Vacuum Breather Valves

Product Details:

Keywords Valves, Pressure &Amp; Vacuum Breather Valves, , TELTECH INSTRUMENTATION PVT LTD, India
Category Mechanical Parts & Fabrication Services > Valves 
Payment Terms
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Detailed Product Description


The Series 8300 range of Breather Valves minimise vapour losses fromstorage tanks during operations whilst preventing internal pressure& vacuum conditions from exceeding the tank design limits. Henceboth product & vessels are protected as well as tank environmentalconditions.


DESIGN FEATURES

  • Combined Units
    Series 8300 Breather Valves can be fitted in combination with Series8350 Flame Arresters. (This type of installation reduces valve flowcapacities & thus special sizing calculations are applicable).
  • Chemical Service
    Series 8300 Breather Valves can be supplied in a range of alternativematerials for chemical &/or cryogenic services & can be used inconjunction with air dryers fitted at the vacuum inlet port to protectthose products which could be adversely affected by normal atmosphericair. It is suitable for wide range of services in the petroleum,chemical & related industries for land tankage only.
  • Low Leakage
    The resilient diaphragm wraps around the edge of the pallet seat. Thehigh ratio of seating force to seating area provides a tight seal. Asthe pressure or vacuum rises, the relevant pallet begins to lift, butthe diaphragm wrap around at the edge of the seat maintains a goodseal. When pressure or vacuum reaches the set condition, the palletopens fully.
  • Low Blow Down
    Blow down is the difference between opening & closing pressures.
    The floating diaphragm operation, described above, ensures that blowdown is minimised to 10% for pressure relief & 10-15% for vacuumrelief.

INSTALLATION


Thevalve should be mounted on tank roof nozzles as close as possible tothe tank roof to ensure that pressure under the pallet is maintainedwithin 3% of the tank pressure.



FLANGE ADAPTORS


Arange of steel adaptor flanges is available for non-standard drillings,(e.g. DIN ratings), & for use where tank flanges differdimensionally for valve flanges.



VALVE SIZING


Weoffer a rapid response Valve sizing which utilizes data provided byWhessoe-Varec Ltd., UK based upon many years of experience as a majordesigner & supplier of Breather Valves.




MATERIALS OF CONSTRUCTION
 

Body / Coverr

  • Aluminium Alloy LM 25 (standard).
    Cast Steel ASTM A 216 WCB (optional).

Seat

  • Aluminium Alloy LM 25 (standard).
    Cast Steel ASTM A 216 WCB (optional).

Pallet

  • Anodized Aluminium (standard).
    Stainless Steel AISI 304 (optional).

Screen

  • Stainless Steel AISI 304.

Guides

  • Stainless Steel AISI 304.

Diaphragm

  • Fluorinated Ethylene Propylene (FEP).

Hardware

  • Mild Steel ( Zinc Plated / Yellow Passivated).

Hood

  • Galvanized Steel.
Base Flanges
  • ASA 150 FF.
Outlet(For Closed Vent)
  • 4" ( For 3" Valve).
  • 8" ( For 6" Valve).
  • 12" (For 10" Valve).
Adaptors
  • Carbon Steel adaptor flanges are available for non
    -standard drillings & where tank flanges
    differ dimensionally from valve flange.


SPECIFICATIONS
 

Size

  • 2", 3", 4", 6", 8", 10", 12".
Settings
Maximum Vacuum
  • 220 mm (8.7") (All Sizes).

Maximum Pressure(optional)

  • 250 mm (9.9") (All Sizes).
  • 10" to 1.5psi (For 2" to 4" Sizes).
  • 10" to 1.0psi (For 6" to 12" Sizes).

Min. Pressuree

  • 38 mm (1.5") (2" Size).
  • 25 mm (1.0") (3" to 10" Sizes).
  • 19 mm (0.75") (12" Size).






Pressure &Amp; Vacuum Breather Valves

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