Cast steel gate, globe, and check valves
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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...

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 &...

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">

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...

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

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 >

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). >

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...

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 >...

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. >

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...

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 >

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)...