TRIPLE OFFSET Quarter Turn valves DN 80…1500, PN 16/140

Дисковые затворы Bray Tri Lok

Bray’s Tri Lok is the only valve in its class with a splined disc/stem connection. The Tri Lok connection allows axial movement of the disc independently of the stem. Therefore, the disc seal and body seatremain in position, unaffected by temperature fluctuations and pressure effects on the bottom of the stem. This design prevents the typical misalignment problems of rigidly attached discs and stems. The splined connection offers maximum strength. Close tolerance engagement between the disc andstem eliminates hysteresis. Tri Lok’s internal disc to stem connection eliminates exposure of stem retention components, such as pins or taper pins, to the line media. It is common for such exposed connections to result in leak paths, erosion, corrosion and vibration failures. Additionally, these external connections often require difficult machining for disassembly. Disassembly of Bray’s connection is performed by just pulling the stem out of the disc.

 

Temperature Range:- 425°F to +1,200°F-254°C to +650°CPressure Ratings:

  • ANSI Class 150, 300, 600 & 900 to full ASME B16.34 (PN 10 to 140)

Specifications

Version: - wafer
- lug
- flanged
Diameter nominal-metric DN, mm: 80…1500
Pressure nominal PN, Bar: 16 ... 140
Max pressure: 16 ... 140
Velocity limits: fluids: 9 m/s
gases: 54 m/s
Body materials*: 1.0619 Carbon Steel
1.4408 Stainless Steel
Duplex
Alloy
Monel
Titanium
Disk*: Carbon Steel
Low-temperature Carbon Steel
1.4408 Stainless Steel
Duplex
Alloy
Monel
Titanium
Stem*: 1.4542 Stainless Steel
Seat: Metal-to-Metal
Actuator: handle / gear operator / pneumatic actuator /electriс actuator
Accessories: SS actuator / positioner / solenoid valves

*other materials are available upon requst

Datasheet

TRIPLE OFFSET Quarter Turn valves

TRIPLE OFFSET Quarter Turn valves

 

Bray Controls is proud to introduce the Tri Lok® Series Triple Offset Valve – the latest evolution in high performance quarter turn valve technology. Bray’s Tri Lok is the only triple offset built with 21stCentury innovation.The Tri Lok Series offers customers the benefit of Bray’s innovation.Design improvements include:

• Unique Hub & Bearing system provides maximum stem support while preventing media ingress.

• Unique Splined disc/stem connection facilitates self-alignment of the disc seal with the seat, and eliminates the requirements of external pins, keyways and other types of fasteners.

• Seat/Seal system features field replaceable body seats and disc seals.

body Hubs & Bearing System

Bray’s unique bearing system features Inboard Body Hubs that protrude into the valve flow way, allowing the bearings to extend fully to the disc. This configuration produces the least amount of unsupported stem length possible. Stem deflection and strain during operation under high pressure
drops are greatly reduced – substantially enhancing performance and increasing the valve’s service life. The top and bottom Stem Bearings, offered in NiResist D2 as standard, securely support the stem. By
incorporating advanced metallurgy in the bearing design, Bray has eliminated stem galling under heavy loads.
The Body Hubs also raise the stem entry point into the body above the area where the media particles normally settle and over time potentially penetrate between stem and bearing. This profile minimizes bearing failure and extends the valve cycle life.

Splined Disc/Stem Connection

Bray’s Tri Lok is the only valve in its class with a splined disc/stem connection. The Tri Lok connection allows axial movement of the disc independently of the stem. Therefore, the disc seal and body seat
remain in position, unaffected by temperature fluctuations and pressure effects on the bottom of the stem. This design prevents the typical misalignment problems of rigidly attached discs and stems. The splined connection offers maximum strength. Close tolerance engagement between the disc and
stem eliminates hysteresis.
Tri Lok’s internal disc to stem connection eliminates exposure of stem retention components, such as pins or taper pins, to the line media. It is common for such exposed connections to result in leak paths,
erosion, corrosion and vibration failures. Additionally, these external connections often require difficult machining for disassembly.
Disassembly of Bray’s connection is performed by just pulling the stem out of the disc.

Tri Lok’s frictionless, non-interference metal-to-metal seal delivers zero leakage with the least amount of torque. The metal-to-metal contact is inherently Firesafe.
The standard Body Seat material is 321 Stainless Steel, with other materials and/or Stellite overlay available. The standard Disc Seal is a laminated 321 StainlessSteel /Graphite ring, secured in position by a full-faced retainer bolted to the disc. The elasticity of the laminated ring ensures uniform peripheral sealing with the seat, achieving full shutoff regardless of flow direction. Bray offers a solid metal disc seal for high temperature and severe applications. The system ensures bi-directional zero leakage throughout the full pressure/temperature range.
Tri Lok Series valves feature independent field replacement of both the body seat and the disc seal. Two drilled and tapped holes in the body seat ease removal. Seat and seal materials can be changed, if application requirements change, without replacing the entire valve. Maintenance time and costs are substantially reduced, and the service life of the valve is extended.

Splined Disc/Stem Connection

Bray’s Tri Lok is the only valve in its class with a splined disc/stem connection. The Tri Lok connection allows axial movement of the disc independently of the stem.

 

Seat /Seal System

Tri Lok’s frictionless, non-interference metal-to-metal seal delivers zero leakage with the least amount of torque. The metalto-metal contact is inherently Firesafe. The standard Body Seat material is 321 Stainless Steel, with other materials and/or Stellite overlay available. The standard Disc Seal is a laminated 321 Stainless Steel /Graphite ring, secured in position by a full-faced retainer bolted to the disc. The elasticity of the laminated ring ensures uniform peripheral sealing with the seat, achieving full shutoff regardless of flow direction. Bray offers a solid metal disc seal for high temperature and severe applications. The system ensures bi-directional zero leakage throughout the full pressure/temperature range.
Tri Lok Series valves feature independent field replacement of both the body seat and the disc seal. Two drilled and tapped holes in the body seat ease removal. Seat and seal materials can be changed, if application requirements change, without replacing the entire valve. Maintenance time and costs are substantially reduced, and the service life of the valve is extended.

1-Replaceable Body Seat reduces field maintenance costs.

2-Optimized Disc Profile provides maximum strength and maximum flow capacity.

3-Replaceable Disc Seal reduces field maintenance costs.

4-Bearing Seals eliminate media solids ingress.

5-Stem Bearings support the stem and eliminate galling.

6-Alignment Marks on body, body seat, disc, disc seal and disc seal retainer provide error free assembly.

7-Splined Disc to Stem Connection assists Seat / Seal alignment, and eliminates hysteresis and external pins / taper pins.

 8-Inboard Body Hub & Bearing System minimizes stem bending and strain, prevents process debris ingress and maintains Body Seat / Disc Seal alignment.

Triple Offset Geometry

allows for metal-to-metal sealing without interference
and provides a long service life.


TRIPLE OFFSET DESIGN
Below is a description and illustration of the traditional triple offset design. The first offset is the stem set away from the disc edge (1). This allows for a continuous sealing surface uninterrupted by the stem. The second is the stem centerline offset to one side of the valve centerline (2).This produces a cam?like rotary motion of the disc that pulls the disc edge from the seat upon opening. As the disc reaches the closed position, this cam-like offset converts the rotary motion to a linear motion that pushes the disc into the seat. The disc edge does not contact the seat throughout the full range of travel. The third offset consists of conical seal and seat edges with both cones tilted away from the axis of revolution (3). The offset tilting of the cones facilitates rotary disengagement of the disc from the seat. This cone-in-cone geometry removes the entire disc edge from the seat immediately upon opening rotation of the disc and engages contact only at closing. All interference between disc and
seal is eliminated. Contact Bray to learn what the power of triple offset valves can deliver to you. Insist on Tri Lok!

Temperature range:

 -254°C ... +650°C

Pressure range:

ANSI 150, 300, 600 и 900

ASME B16.34

(PN 10 - 140)

Parameters

ALIGNMENT MARKS
As standard, alignment marks in the body, body seat, disc, disc seal ring and disc seal retainer ensure proper assembly of these parts.

Disc
Using proprietary software, the disc profile has been optimized to provide the highest strength.

Stem
Standard stem materials are 17?4 PH, 416 Stainless Steel and Nitronic 50. Other materials are available. The high-strength, one piece stem features a Blow-out Proof Prevention Ring located above the packing box and outside the pressure boundary. All stem ends conform to ISO 5211 and provide clear indication of disc position in accordance with API 609.

Wafer/Lug/Double Flanged Bodies
The one?piece bodies offer bi?directional sealing as standard to full ANSI Class 150, 300, 600 and 900 (PN 10 to 140) pressure ratings. The neck allows for easy access to the stem for packing adjustments and actuator mounting.

stem seal & packing system
The high temperature graphite stem seal provides constant compression for a positive seal around the stem preventing fugitive emissions and providing firesafe protection. A Stainless Steel Thrust Washer holds the stem seal in position. The stem packing system is easily adjustable without removing the mounting plate or actuator. A slight 1/4 turn of the hex head nuts is usually all that is needed should field adjustment ever be required.

Pressure/Temperat ure Ratings
The Bray Tri Lok Series is fully rated to ASME B16.34,b thus eliminating the need for seal material compatibility, temperature or pressure limit verifications.

Materials of Construction
Valve bodies and discs are available in WCB Carbon Steel and CF8M Stainless Steel as standard. Duplex Stainless Steel, Monel, Hastelloy® and other materials are available. The disc is normally the same material as the body to allow full pressure/temperature rating and maintain uniform thermal expansion at elevated temperatures. Stem, Seat/Seal and all trim materials are selected to best meet the required mechanical properties while providing any needed corrosion resistance. For further specifics consult the Tri Lok Series trim materials listing. Standard materials of the body seat and disc seal are 321 stainless steel. Tri Lok’s sealing geometry eliminates any possibility of galling between these materials since the entire disc seal immediately dis

Applications
Tri Lok Series valves are well suited for operation in vacuum to high pressure and cryogenic to high temperature applications. The standard resilient metal?to?metal seal system is inherently firesafe, and is suitable for steam, slurries and other difficult media. Applications requiring a zero leakage seal can now be accomplished with one valve, the Bray Tri Lok. When compared to gate, globe, or ball valves of the same size and class, Bray quarter turn valves provide space, weight and installation reductions – resulting in lower construction and maintenance costs.

Technical Information*