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Quick Opening Closure
Quick Opening Closure
QUICK OPENING CLOSURE
Safe and Secure Sealing
Open or Close in Less Than 30 Seconds
Description
Vista, Inc.’s Clamp Ring Closures are quick-opening closures, easily operated by one person. The closure is designed primarily for horizontal installation, meaning the door swings open on the horizontal axis. However, the closure can be installed on a vertical installation. In the latter case, a counterbalance can be provided to facilitate opening.
Features
The Clamp Ring Closures, available in sizes 4-inches and larger, offer important advantages:
A reliable seal – The large, cross-sectional diameter Seal located on the periphery of the closure’s barrel collar provides positive sealing as well as protection from damage by tools, pigs or debris.
Pressure warning device – The Clamp Ring Closures are equipped with a pressure warning lock, in accordance with UG-35 of ASME Sect. VIII, Div. 1, to alert the operator to the existence of internal pressure prior to opening the closure.
Fast, easy, safe operation – One person can easily and quickly open or close the Clamp Ring Closures. Because it operates so easily, this closure is less time-consuming than other closures on the market. Because an operator must stand to the side when opening the pressure warning lock, clamp ring and door, the Clamp Ring Closures is safer to open than other closures that require an operator to stand in front of the door.
Clamp Ring Closures feature a lever-type actuator on sizes 4- through 30-inches. Sizes 32-inches and larger have a door assist (ratchet binder).Closures smaller than 32-inches at higher pressure also may feature a door assist mechanism.
Representative Uses
Tube Turns Hinged Closures are being employed in virtually every industrial field. Some of the more representative uses include:
Gas, Oil and Products Pipelines
Scraper traps, blowdowns, scrubbers, filter separators/coalescers, terminal manifolds, meter provers, storage tanks, autoclaves, Terminal Manifolds and drier pots.
Processing
Mixing and cooking vessels, extractors, filters, hand-holes in distillation towers, storage tanks, vacuum-service equipment, etc.
Petroleum Production and Refining
Quick-opening blinds on “Christmas trees”, sweetening vessels, storage tanks, strainers and filters.
Surface Transportation
Manways on tanker trucks, hatch and manway covers on barges and ships, etc.
NEW TECHNOLOGY TESTED
The Vista Quick Opening Closure has been fully tested under extreme high pressure for its performance.
ABAQUS & ANSYS Finite Element Method Non-Linear Analysis
All Vista Closures are computer designed. Special closures are analyzed using the latest ABAQUS & ANSYS Finite Element Package.
The Vista Quick Opening Closure has been fully tested under extreme high pressure for its performance.
ABAQUS & ANSYS Finite Element Method Non-Linear Analysis
All Vista Closures are computer designed. Special closures are analyzed using the latest ABAQUS & ANSYS Finite Element Package.
Vista’s engineers are meeting the challenge of these ever changing industries by continuing to improve the performance of existing products and developing new products and equipment.
Technical Specification
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Size Range |
6” to 100” Nominal diameter |
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Class Ratings |
ASME 150# through to 2500# |
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Design Specifications |
ASME VIII Division 1 ASME VIII Division 2 PD 5500 / BS EN 13445 |
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Closure Orientation |
Horizontal or Vertical |
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Termination Design Specifications |
ASME B31.3, B31.4, B31.8 Other International standards are available on request |
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Types of Connection |
Butt Welded, Butt Welded with mitre for inclined/declined vessels or Flanged to clients requirements |
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Materials of Construction |
ASTM A350 LF2 / ASME II SA350 LF2 ASTM A105 / ASME II SA105 ASTM A694 F42 to ASTM A694 F70 Grade 304L or 316L Stainless Steel Duplex Stainless Steel (UNS S31803) |
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Elastomeric Sealing |
Nitrile, Viton and ED Resistant elastomers Other material options available on request |
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Standard Closure Finish |
Removable rust preventative for client to finish paint after welding to vessel |
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Special Closure Finish |
Electroless Nickel Plated Grade 316 Stainless Steel or Inconnel 625 Weld Overlay |
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Accessories |
The Vista’s closure can be fitted with a all types of interlocks available on request. Horizontal Closures can be supplied with protective weather covers (Vertical closures are supplied with protective weather covers as standard) |
Unique Seal
The purpose designed servo acting double edged lip seal energizes at zero pressure. It is housed in the door face for protection and long life and is easily fitted without tools. The one piece moulding is available in a range of elastomers and at the highest pressure, incorporates a stainless steel spring to prevent extrusion and provides a full vacuum capability. The one piece seal design aids in function in both horizontal and vertical applications.
Design Fabrication Features
The Vista QUICK OPENING CLOSURES are fabricated from ASTM A-105N or 350-LF2 and forgings or ASTM A-516-70 plate. For special applications, Vista closures can be furnished in alloy materials, as well as weld overlayed. The Vista closure is also available in MS ratings, or may be custom designed under ASME VIII, Div.1, Appendix 24, Div 2, or other applicable construction code authority. The Vista Quick Opening Closure has been fully tested under extreme high pressure for its performance.
QUICK OPENING CLOSURES are manufactured from ring rolled forgings that permit larger closure designs and are not limited to standard diameters. Closures can be designed for the customer’s exact operating requirements, rather than using the (often considerably heavier than required) ANSI series.
