Special Application Solutions

SCORE VALVES has application and manufacturing experience for municipal service including district heating, potable water, water/wastewater distribution, and flow control. The install base of TRICENTRIC® and HIGHSEAL® valves includes up to 84” and Class 300 ratings to both ASME and AWWA design standards.

SCORE VALVES’ aerospace experience includes 35+ years of engineered product expertise with NASA Kennedy Space Center and Stennis Space Center, Arnolds Air Force Base, Lockheed Martin Corporation, McDonnell Douglas, MDS Aero Support Corporation, Aerojet Rocketdyne, and most other major private spaceflight companies.

Our industry-proven install base for control and isolation valves up to 96” includes wind tunnel flow and pressure control, launch pad vibration, and sound suppression. Aerospace safety-critical applications, including NASA mobile launchers, launch pads, rocket engine test stands for fuel and oxidant loading, venting, and purge systems along with ground support systems for distribution and storage make up a significant portion of our aerospace installations.

SCORE VALVES has experience with seawater, brine, and recycled water applications including desalination facilities, drilling rig topsides fire suppression systems, tailings ponds, and cooling recycle water containing a high chloride content. Valve material selection and processing require special consideration for general corrosion, pitting, and chloride stress corrosion cracking resistances. Valves materials used for these processes include alloy 20, duplex, super duplex, super austenitic, nickel-aluminum-bronze, Monel®, and Inconel® with component materials selected for optimal application performance. Customers include Pertrobras in Brazil, Talisman in Malaysia, North Sea installations, and various companies from the oil and gas industry.

TRICENTRIC® valves are designed for temperatures up to 1,500°F and higher.

The valve’s all-metal, robust construction and metal-to-metal unique geometric design provides a tight shut-off without any jamming—even at large temperature differentials. The selection of materials and design options is determined according to temperature, media, and pressure conditions. Extended bonnets are typically used above 975°F to ensure effective packing sealing. High-temperature materials include CF8H, CF8MH, CF8CH, CY-40, and CW6MC; up to 84”, CL300 size.

TRICENTRIC® Reduced Port valves have closure elements where the flow area/port of the disc is less than the inside of the pipeline or pipe flange. Reduced port valves are primarily used in applications involving steam-jacketed piping or control valves for the control of fluid flow. The use of the reduced port style valve for jacketed piping ensures the industry standard gasket sealing width is maintained to eliminate emissions and leakage. Reduced port capacity is used in control valve applications for several reasons including:

1. Adapting a valve large enough to handle increased future flow requirements, with a port capacity properly sized for present needs;
2. Providing adequate structural strength and still retaining reasonable travel vs. capacity relationships;
3. Reducing inlet and outlet fluid velocities for a large valve body using a restricted port;
4. Eliminating the need for pipe reducers; and
5. Correcting errors in oversizing via the usage of a restricted capacity port.

SCORE TRICENTRIC® Reduced Port valves can be constructed in wafer, lugged, double flanged, or buttweld styles using all available wrought and cast materials with any combination of trim materials and valve options.

We stock the following ASME CL150 wafer valve sizes: 4”×3”; 6”×4”; 8”×6”; 10”×8”; and 12”×10”; with additional sizes, classes, materials, and styles available upon request.

For standard services, TRICENTRIC® valves incorporate graphite bearing protectors as standard, which provide protection against media build-up in the bottom bearing area as a result of vertical shaft installation. But when media contains abrasive entrained particulate or when there is potential for media precipitates, bearing options are available to ensure long-term valve performance in harsh applications. These conditions can cause wear, galling, and binding resulting in increased actuation torque and reduced service life.

TRICENTRIC® offers the following solutions:

• • Energized seals and O-rings are incorporated to provide a pressure seal to mitigate particulate migration into bearing areas.
  • Bearing purge and lubrication ports incorporate a fluid passage through the body to a lantern ring between the packing and bearing. This fluid passage flushes any media or contaminants from the bearing areas to maintain proper bearing operation.
  • Outboard bearing designs are applied in severe service conditions in which bearing wear and binding are likely to occur but the options of bearing protection and bearing purge/lubrication will not effectively overcome this problem or cannot be applied due to temperature, abrasiveness, or purge/lubrication fluid compatibility issues. Outboard bearings are installed outside the pressure envelope (packing) thereby making them unaffected by media fluid composition. Design, materials, and details of construction are application-specific.

Specialty Control options are available for the TRICENTRIC® valve including:

• Controlled orifice port and disc designs provide a specific minimum or maximum flow condition.
• Control cartridges can provide a linear flow curve.
• Splined disc connections are available to ensure mechanical integrity in services with high vibration, noise, and/or pressure drops.

Erosion-resistant options are available for TRICENTRIC® valves to resist the 4 principal types of erosion:

1.  Abrasive particles;
2.  Cavitation;
3.  Erosive-corrosion; and
4.  High liquid velocity impingement (high-velocity gas is dangerous only if droplets of liquid or solids are present).

With the exception of erosive corrosion, a high degree of hardness is required to resist erosive conditions. For erosive corrosion, where the surface oxide layer, typical of stainless steels, is eroded and subsequent corrosion takes place, more noble materials must be used, such as Monel®, Hastelloy®, or Inconel®.

Hard surfacing of component surfaces—when required based on the application details—is available using HVOF, flame spray, or welding processes for deposition of cobalt alloy 21, cobalt alloy 6, or other erosion-resistant materials. Hard surfacing may also be required for non-standard conditions including high cycling, throttling, high vibration, quick closure, or high thermal cycling or ramping.

TRICENTRIC® valves are available as a reduced pressure class where the internal component design has a lower ASME class rating than the body shell ASME class rating. The valve internals ASME rating is based on the standard design and differential pressure rating, and not on limitations or reductions based on material selection.

Applications:

• Reduced process differential pressure conditions;
• Throttling service; and
• Code or standard requirements that cause an increased body shell pressure class.

Benefits:

In specific applications, the use of reduced-pressure class valves will allow for:

• Reduced valve cost resulting from lower internal component costs;
• Reduced actuator costs resulting from lower actuation torque (static and dynamic) requirements and actuator downsizing;
• Reduced piping supports and/or piping stresses resulting from lower valve and actuator assembly weights;
• Feasibility of the application of a butterfly valve where full rated ASME class internals would be unavailable or dimensioning impractical (e.g., 3” CL1500 ASME × CL300 ASME); and
• Increased flow capacity Cv values due to lower internal ASME class allowing reduced pressure drops and greater control capability as the linear portion of the control curve is extended relative to a higher ASME class.

TRICENTRIC® valves are available in all ASME B16.34 materials as well as specialty materials not listed in ASME B16.34 that are registered for pressure service to ASME B31.3 and have been installed in service, including:

• Nickel Aluminum Bronze (B148 Gr. C95500);
• Super Duplex 2507 (A890 Gr. 5A);
• Monel 400 (A494 Gr. M30-C);
• Hastelloy® C (A494 Gr. CX2MW);
• Inconel® 600 (A494 Gr. CY40);
• Inconel® 625 (A494 Gr. CW6MC);
• Nickel 200 (A494 Gr. CZ100); and
• Titanium 2 and 3 (B367 Gr. C2 & C3 and B381 Gr. F2 & F3).

SCORE VALVES’ high-purity applications include medical gas production and distribution; commercial drug production projects; and food and beverage installations.  Designs incorporate TRICENTRIC® Triple offset, non-rubbing, friction-free shut off throughout full pressure to vacuum rating range; resilient material selection to minimize outgassing; non-particle shedding components; a wide selection of materials to suit specific service conditions; the ability to seal in either direction—suitable for alternating vacuum-pressure processes; close control of valve tolerances and finishes to ensure a long cycle life and minimal cavities to nearly eliminate trapping of media; and FDA approved clean room assembly.

SCORE VALVES’ man and process-safe applications include a block and bleed orientation using two individual valve disc assemblies with a bleed space between to allow monitoring and ensure a man-safe environment downstream of the valve per OSHA requirements or the use of one disc assembly with two seals incorporating a bleed off port between the seals allowing for bleed off and monitoring to ensure a process safe environment downstream of the valve per API requirements. Both options are supplied by SCORE VALVES and are available for up to 96” diameter valves.

TRICENTRIC® valves are available to suit industry and end-user-specific specialty flange ends and facings to ASME; AWWA; DIN; RTJ; tongue and groove; o-ring; and clamp joint ends and are available with special surface finishes and concentric grooving.

TRICENTRIC® and HIGHSEAL® valves are available for applications requiring submerged service or remote mechanical operation with watertight housings, extensions, and hand wheel extensions (rigid and flexible) for gear and actuator options. 3-way linkages are also available upon request.

TRICENTRIC® valves are available with specialty surfaces including coatings, plating, and treatments both externally and internally for erosion prevention and corrosion protection. Options include HVOF; flame spray; chrome, nickel, copper, and silver plating; and ceramic, TFE, PTFE, and Ti-Nitride plasma vapor deposition coatings. Surface treatments include nitriding; electro-polishing; and pickling and passivation.

TRICENTRIC® valves are available with supplemental testing including cryogenic conditions to BS 6364, MSS SP-134, NASA, or end-user specifications; high-temperature leakage and performance testing to 1,400°F; and fugitive emission testing. TRICENTRIC® valves are available with ISO 15848, Method 21 tests, and API 641. This includes cycle testing valves up to 5,000 times over three thermal cycles, from ambient to 350°F with no packing adjustments required over the duration of the test.