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VELAN
Cast steel gate, globe, and check valves

Cast steel gate, globe, and check valves

Product catalog summary

Manufacturing Program: Velan is a prominent manufacturer of industrial valves, including gate, globe, check, ball, butterfly, and knife gate valves, used in critical applications across industries such as chemical, petrochemical, oil and gas, and power. The company operates 12 specialized manufacturing plants globally.

Manufacturing Technology: Velan utilizes advanced manufacturing technologies and automation to ensure high-quality production, focusing on quality, safety, ease of operation, and long service life.

Low-Emission Technology: Velan's valves comply with stringent national and international standards for fugitive emissions, making them suitable for industries like oil, chemical, and power generation.

Design Features: The valves are designed to meet ASME standards and specific customer requirements, with a focus on quality assurance and control, including pressure and qualification testing for reliability and service life.

Product Range: The document details various types of valves, including gate, globe, check, and special service valves, as well as stainless steel valves and accessories.

Engineering Data: Technical specifications provided include material grades, temperature ranges, and valve sizes, ensuring appropriate selection for specific applications.

Quality Assurance and Control: Velan's quality assurance program includes design compliance, quality control from material receipt to final product, and pressure testing, with certifications to ISO 9001 and ASME standards.

Continuous Improvement: Velan employs Total Quality Management (TQM) and continuous improvement teams to enhance process quality and efficiency.

Innovations: Advanced technologies like automatic plasma arc hardfacing and computerized casting process simulation are used to improve product quality and reduce defects.

Global Presence: Velan has a strong global presence with manufacturing plants and distribution centers in North America, Europe, and Asia, supported by a network of sales offices and distributors worldwide.

Overview: The document discusses the qualification testing of cast steel bolted bonnet gate and globe valves for compliance with EPA fugitive emissions regulations, highlighting the evolution of the Velan stem seal and its effectiveness in ensuring leakage of less than 100 ppm through extensive laboratory testing.

Specifications: The Velan stem seal is designed to handle large loads, with sealing achieved at high compression loads (4,000 psi for graphite), featuring small clearances between vital parts and precision stem and packing chambers.

Design Features: Live-loading using Belleville springs maintains a permanent packing stress of 3500–4000 psi, extending the low emission service life, especially under conditions with large pressure/temperature transients or frequent cycling.

Testing and Results: Valves were tested using propane at 115 psi and ambient temperature, with an organic vapor analyzer measuring leakage in ppm. Retightening gland bolts could reduce or eliminate leakage after leak paths developed.

Gasket Performance: Standard corrugated steel gaskets without graphite were unsuitable for low emission service. The best performing gasket was a corrugated steel gasket with graphite-filled channels, achieving zero ppm leakage over 3700 cycles for a 6" Class 150 valve.

Body-Bonnet Gasket Design: Ensures leakage of no more than 20 ppm and requires no retorquing after long cycling, effective under wide fluctuations of temperature and pressure.

Seat Tightness: Emphasizes the importance of sufficient contact pressure generated by torque, with Velan API 600 gate valve seat tightness achieved through eight important steps in assembly and testing.

Material Specifications: Detailed material specifications for various parts of the valves, including body, bonnet, stem, wedge, seat, and packing materials, with options for different grades of steel and alloys.

Gate Valve Dimensions and Specifications: Detailed dimensions for gate valves across various classes (150-600, 900-1500), including design features like a non-rotating stem with precision Acme threads and materials like cast carbon, stainless, or alloy steel.

Globe and Stop Check Valves: Dimensions for globe and stop check valves in classes 150, 300, and 600, with design features like a non-rotating stem and precision machined body and bonnet.

Check Valve Specifications: Dimensions for check valves across various ASME classes, with design features like robust disc construction and fully enclosed gaskets.

Design Features and Options: Highlights design features such as safer and tighter stem seals, live-loading with Belleville springs, and stronger leakproof body-bonnet joints.

General Notes: Includes references to additional pages for valve weights, CVs, and other specifications, emphasizing the availability of forged gate and globe valves in higher classes (900-2500).

Overview: Velan offers a comprehensive line of API 600 gate, globe, and check valves approved by Phillips and listed by UOP, designed for handling HF acid and cryogenic applications.

Design Features: HF Acid Valves feature nickel-plated overlay on backseat and solid age-hardened K-Monel 500 stems. Cryogenic Valves are made from austenitic stainless steel with features like extended bonnets and flexible wedges.

Materials: Body and bonnet made from austenitic stainless steel castings, with options for different stem and seating face materials.

Specifications: Valves available in various sizes and pressure classes, with actuator options including electric, pneumatic, hydraulic, and manual gear actuators.

Applications: Suitable for industries using HF acid and for handling liquefied gases such as oxygen, nitrogen, argon, natural gas, hydrogen, or helium.

Additional Features: Velan's low-fugitive emissions guarantee based on extensive testing, with easy in-line valve reseating and maintenance features.

Catalog excerpts

Cast steel gate, globe, and check valves-3

PLANT 1 PLANT 3 MONTREAL, CANADA 109,000 sq. ft. (10,126 m > 2 ) > 1 ⁄ > 4 4֔ (8100mm) forged gate, globe & check valves, ASME ֑N stamp, ISO 9001 WILLISTON, VERMONT, U.S.A. 155,000 sq. ft. (14,400 m > 2 )2Җ24 (50Ԗ600mm) forged and cast steel gate, globe and check valves, ASME Nђ stamp, ISO 9001 PLANT 2 & 7 MONTREAL, CANADA 170,000 sq. ft. (15,800 m > 2 ) 260֔ (501500mm) forged and cast steel gate, globe, check, ball, knife and butterfly valves 3֖36 (80Ԗ700mm) ASME Nђ stamp, ISO 9001 LYON, FRANCE 160,000 sq. ft. (14,900 m > 2 ) > 1 ⁄ > 4 40֔ (81,000 mm)forged and cast steel gate, globe and butterfly...

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Cast steel gate, globe, and check valves-4

Velan's comprehensive line of cast steel gate globe and checkvalves features leading edge design, engineering and manu- facturing technology. Our valves meet the most stringent national and international standards for fugitive emissions. Our gate globe and check valves are widely used in manyindustries including: Process Industries Power Industries Ֆ Nuclear, Fossil Fuel, Combined Cycle,Cogeneration and District Heating. In addition, our valves are used for Ship-building, LNG Tanker Carriers, Offshore Platforms, Water Treatment, Mining and more. Oil, Chemical, Petrochemical, Refining,Pulp & Paper,...

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Cast steel gate, globe, and check valves-6

Our aim is to offer products and services which not only meet, but clearly exceed,the expectations of our customers.Through training, teamwork and performance,our employees strive to achievecontinuous improvement of all processes.Our goals are: Total Quality and On-time Delivery.Our method is Total Commitment. A.K. Velan,President and C.E.O. > ON-LINE NETWORKED SPC Velan has installed on-line networked SPC computers operated by machinists themselves.Each unit can handle fourgageports and provide instant feedback on tool wear and lubrication to a control manager station. 4 size="-2">

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Cast steel gate, globe, and check valves-7

1. DESIGN > All valves are designed to comply with the requirements of ASME B16.34, the ASME code and special customer requirements, as applicable. 2. QUALITY ASSURANCE > Every step from procurement through production, welding, assembly, testing and packaging is in accordance with written quality programs and procedures. (An ASME Section III manual for code valve production and an ISO 9001 QA manual for all other production.) Velan's six North American plants are certified to IS0 9001 and Plants 1 and 2 have ASME NӔ type Certificates of Authorization, Plant 3 has a Certificate of Accreditation...

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Cast steel gate, globe, and check valves-8

Automatic 3-way facing machine.For smaller runs, complete automatic machining and drilling in one set-up. Automatic bonnetmachine.Automatic multipledrilling machine. >

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Cast steel gate, globe, and check valves-9

High quality deposits of Stellite 6 and other hardfacing alloys are assured by the use of the following state of the art technology: controlled preheating, automatic Plasma Arc hardfacing equipment and a controlled cooling process. Shown below is the hardfacing of a gate valve wedge and to the right a cast steel seat. 7 >

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Cast steel gate, globe, and check valves-10

Top: Bottom Right: Semi-automatic stations for testing 212" (50֖300 mm) valves to API 598. Operational test for electric actuators. Bottom Left: TA-LUFT qualification test on a 4 Class 600 gate valve with live-loading. The test medium is helium at 1500 psi (100 bar). >

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Cast steel gate, globe, and check valves-11

1. X-Ray Sample (pattern)Approval Process; > (API 600/ISO 10434) Rejected castings due to defects such as hydro-test leakage, porosity, inclusions, shrinkage indication discovered by x-ray or machining, are entered into the computer, as part of the statistical control of each vendor. The Velan VEL-QCI-955 Program was implemented to set the quality control standards for pressure boundary castings, and to ensure a consistent supply of quality castings to Velan. 2. X-Ray Monitoring Program; 3. Casting Monitoring Program. > Before castings are released forproduction, the Velan NDE Inspector Level...

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Cast steel gate, globe, and check valves-12

The Velan stem seal evolved from these test findings: > ● Ensures leakage of less than 100ppm as demonstrated through extensive laboratory testing. > ● Large loads . Sealing is achieved when compression load is high and packing forms a mass of low porosity and permeability (4,000psi for graphite). > ● Small clearances between vital parts. Straightness, roundness and fine finish of stem and packing chamber wall are essential. > ● Precision stem and packing chambers. > ● Short and narrow packing chambers improve sealing .Maximum six rings in a single set chamber and wherever possible, only > 1...

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Cast steel gate, globe, and check valves-14

Upper right: 50 cycles with steam at 400F (204аC)Leakage: zero ppm. Upper left: 3000 cycles with propane at 125 psiLeakage: zero ppm. > Left: Thermal shock with water at 60ְF (15C)Leakage: zero ppm. >

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Cast steel gate, globe, and check valves-15

GRAPHITEFILLER CORRUGATEDSTEEL TYPICAL TEST RESULT: > ● Ensures leakage of no more than 20 ppm asdemonstrated through extensive laboratory testing. 3700 cycles with zero ppm for 6" Class 150. 13 > ● Requires no retorquing after long cycling. > ● Effective under wide fluctuations of temperatureand pressure. Standard corrugated steel gaskets without graphiteas specified in API 600 were found to be an unacceptable choice for low emission service, even under ideal laboratory test conditions, and regardless of flange finish and gasket load. After testing several alternative gaskets, we selected the...

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Cast steel gate, globe, and check valves-17

Relapping of seating facesafter seal welding.Determination of final seat/seat angle with gauge andshims to determine ideal wedge angle (660"). > Precision grinding of individually fit wedge seating surfaces. Lapping of wedge seating surfaces. Assigning the ideally fitted wedge, ground and lapped, to proper valve body. After assembly, pressure testing of shell, seats, packing and backseat to API 598.15 >

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FLATSEATCONICALSEAT > ● Machining, lapping to close tolerances is easy. > ● Line contact seal. > ● Flatness tolerance easy to control. > ● Contact pressure increase by 1.55 with same stems and yokes. > ֢׏ Area contact wide seat. > ● Disc is guided by the mating surface of the seat. > ● Seat has greater elasticity. > ● Hard thrust pad prevents galling. > ● Lower closing torques. > ● Faster maintenance in-line. Flat seating faces canbe lapped and checked for flatness easier. > ● Recommended for high pressure-temperature. > ● Cage unit design with no penetration of body prevents: a) Possibility...

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Cast steel gate, globe, and check valves

Cast steel gate, globe, and check valves

Catalog excerpts

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