Complete Valve Solutions for the Pulp and Paper Industries

Complete valve solutions for the pulp and paper industries

• Knife gate valves • Metal-seated ball valves • Resilient-seated ball valves • Gate, globe, and check valves • Torqseal™ triple-offset valves • Cap-Tight digester capping valves

Sizes: 1/4 – 64” (8–1600 mm) A world leader in valve design, engineering solutions, and manufacturing

Velan holds all major industry certifications, including ASME VELAn AT A GLAnCE Section III, ISO 9001:2000, PED, History and API 6D. Many prominent •Founded in 1950 companies have established Sales partnerships or global supply •Over $400 million agreements with Velan. People •Over 1,800 employees A global manufacturing Global network leader •13 production facilities Velan uses the latest automation •5 plants in North America technology, including CNC ma- •4 plants in Europe chines and many special-purpose •4 plants in Asia transfer machines, enhanced by •4 stocking and distri-bution centers proprietary production tech- •Hundreds of distributors niques. Thanks to a wide range worldwide of equipment, we can efficiently • Service shops worldwide handle highly customized orders as well as large production runs. Product line A world-leading range of cast and forged steel gate, globe, Velan employs over 1,800 profes- check, ball, triple-offset, sionals, the majority of whom knife gate, severe service are located in North America. valves and steam traps International production centers across all major industrial are complemented by a global applications sales and distribution network, Quality A large Torqseal™ triple-offset valve used for crude oil service offering personal customer All major approvals in the Dalian Seaport (China). service and quick access to stock •ISO 9001 (since 1991) worldwide. Because customer •ASME N stamp for nuclear requirements for immediate quality (since 1970) Leading the way... Engineered solutions deliveries have escalated in the •API 6D last few years, Velan has opened Velan is one of the world’s •Total Process Improvement Velan’s Engineering Group has a number of VelNow quick-ship largest manufacturers of indus- Program including Lean vast experience, sophisticated warehouses in North America Manufacturing, Six Sigma trial steel valves, recognized as software, and testing tools that to supplement the inventories a leader in quality and innova- Engineering enable us to find solutions to any of our stocking distributors. tion. Founded by A.K. Velan in customer challenge. Leader in valve design with 1950, our company leverages many first-to-market innovations: advanced engineering capabili- Whether it is for valves to handle Total quality commitment ties and innovation to continu- • Extensive engineering, liquid helium at -458°F (-272°C) R&D, cycle test facilities, ously expand our offering of Velan is totally committed to in the world’s largest particle and stress analysis industrial valves. offering products and services accelerator at CERN, Geneva; that exceed customer expec- • Proven ability to satisfy four-way switch coker ball tations. All Velan valves are special project requirements Today, Velan gate, globe, check, valves to handle one of the designed and manufactured with • Field Engineering Services ball, triple-offset, knife gate, refining industry’s toughest an emphasis on low emissions, Production capabilities and engineered severe service services; or valves for main safety, simple maintenance, ease Leader in automated valves are installed throughout steam isolation service in an of operation, and, above all, long, production: the world, handling diverse operating nuclear power plant, and reliable service life. In fact, •CNC and multi-station applications in cogeneration, Velan has been selected by several years ago when a leading transfer machines fossil, nuclear power, oil and most of the world’s leading North American repair shop did gas, refining and petrochemicals, Velan value engineering construction firms an analysis on the reliability and chemicals and pharmaceutical, •Strong management team, and industrial end users. A long- repairability of commodity valves, pulp and paper, LNG and cryo- stable company standing commitment to quality Velan finished first. Whether we genics, marine, mining, water Products proven to offer: has kept Velan at the forefront are manufacturing commodity and wastewater, and HVAC •Low emissions of industry standards. valves or specialty valves, we industries. •Easy maintenance deliver excellent long-term value •Long and reliable service to our customers. •Low TCO •Quality that lasts

Velan has an installed base Velan’s pulp and paper product line in most major pulp and paper mills throughout North America and the world. Although Velan is a relative newcomer to Gate valves the pulp and paper industry, 1/4 – 64” (8 – 1600 mm), ASME classes 150 – 4500 concentrating on becoming Catalogs: vel-ps, vel-sfv, vel-Csv a market leader in the power industry, the Velan product line fits pulp and paper like a hand in Globe valves a glove. 1/4 – 24” (8 – 600 mm), ASME classes 150 – 4500 Catalogs: vel-ps, vel-sfv, vel-Csv We offer a complete line of forged and cast steel gate, globe, check, ball (resilient and Check valves 1 metal-seated), triple-offset, /4 – 36” (8 – 900 mm), ASME classes 150 – 2500 and knife gate valves. Velan Catalogs: vel-ps, vel-sfv, vel-Csv, vel-DpCv manufactures valves in sizes up to 64” (1600 mm), designed Knife gate valves specifically for reliable, low 2 – 36” (50 – 900 mm), ASME classes up to 150 psig fugitive emissions in difficult Catalogs: vel-KGv services in pulp and paper mill applications. Metal-and resilient-seated ball valves Velan valves represent over A filter isolation installation of 1/4 – 24” (8 – 600 mm), ASME classes 150 – 4500 fifty years of evolutionary Velan knife gate valves. Catalogs: vel-bv, vel-ms, vel-pbv, vel-te, vel-Gpbv improvements that have helped us perfect our designs. Central to Velan’s pulp and paper valve up to 64” (1600 mm), with Cap-Tight capping valves technology is our Securaseal® or without motor actuators. up to 24 x 36” (600 x 900 mm) product line of rugged metal- Furthermore, Velan offers a Catalogs: vel-bDC seated valves offering greater variety of engineered valves strength and longer service for special services in pulp and ™ life. Another key feature of paper mills, including Cap-Tight Torqseal triple-offset valves Velan valves is our emphasis our metal-seated capping ball 3 – 48” (80 – 1200 mm), ASME classes 150 – 600 on simple maintenance; for valve and bolted bonnet knife Catalogs: vel-bf example, our Memoryseal™ top- gate valves for black liquor entry ball valves feature in-line service. Velan’s vast offering of Proquip dual-plate check valves replaceable seats. valves is well positioned for high performance in virtually every 2 – 60” (50 – 1500 mm), ASME classes 150 – 2500 Catalogs: vel-DpCv Velan gate, globe, and check pulp and paper application. valves are available with forged steel bodies in sizes up to 24” Steam traps (600 mm) and cast steel bodies 0 – 2600 psi (179 bar), 1,100ºF (593ºC) Catalogs: vel-st

With 1,242,500 sq. ft. (108,300 m2) of production space in thirteen specialized manufacturing plants, Velan is a true global manufacturing force. One of Velan’s thirteen production centers, this plant in Montreal, Canada houses 170,000 sq.ft. of production space devoted to manufacturing Velan’s most sophisticated valves—including Velan’s Cap-Tight capping valves.

Application expertise: Ball valves

Application Batch digester blow valve: SoLuTion: • Empty contents of digester Velan’s Securaseal® into blow tank. metal-seated ball valve • All stainless construction. Media Stock (chips), liquor, tramp metal • Seat tightness achieved (bullets, barb wire, carburetors, with torque as opposed etc.): to line pressure – bi-directional shutoff. • Valves are actuated and cycle many times a day. • Uninterrupted, fully retained on four sides, • Valves cycled slowly to alleviate body gasket. blow line shock. • Solid tunnel bore ball. • Velocities through the valve Pump discharge shut off —5% pulp at 70 psi (4.8 bar) cycling over are high. • Locked seats to stop 75 times a day. migration of stock behind Problem the seats. Application expertise: Knife gate valves Valves leak internally and externally. • Reliable cup andcone packing design to alleviate external leakage. Application Pump discharge isolation

•50–130 psi (3.5 – 9 bar) — from the pump up to 50 psi (3.5 bar) — header.

Media Fresh water, white water (1%) clear pulp up to 5%:

•Valves are normally actuated and cycle many times a day. •Bi-directional shutoff required.

Problem Standard knife gate valves not designed for bi-directional shutoff.

SoLuTion: Velan’s bolted bonnet knife gate valve • All stainless steel construction. • Seat tightness achieved with torque as opposed to line pressure: – bi-directional shutoff – zero to 150 psi. • Conventional packing chamber eliminates leakage problems associated with standard knife gates. Velan Securaseal ® metal-seated digester blow valve in service at a pulp mill.

Application expertise: Ball valves

® Application stellited Continuous digester heater ring isolation valves: • Isolate the heaters from the digester and each other.

Media Black liquor: • Scaling of cooking liquors. ® • Valves are normally manual the use of a stellite ring with gear actuators. (orange) eliminates the need for either hard chrome plating or electroless nickel and is Problem compatible with most acids Valves stick, leak internally used to de-scale heaters. and externally. Torqseal ™ triple-offset valve application.

Application expertise: Torqseal™ triple-offset valves SoLuTion: ® Velan’s Securaseal Application metal-seated ball valve Black liquor vapor isolation with ring ball Media • Uninterrupted, fully retained Black liquor, vapor with body gasket. traces of black liquor. • Low torque ball — weld the solids-proof scraper seat overlay on the seating Problem with bi-directional shutoff surface means no chrome Soft seated high performance ensures smooth operation in to wash away during acid triple-offset valve gave tight processes that have a high cleaning. shutoff, but for a short time. solids content. the graphite • Cup and cone packing The migration of black is acting as a seal and spring design to alleviate external liquor wore the seat ensuring that the valve has leakage. causing vapor leakage. the capability to shutoff at low pressure. • Low pressure shutoff critical.

SoluTion: Velan’s Torqseal™ triple-offset metal-seated valve • Bubble tight with metal seat. • Seat doesn’t abrade/wear under harsh applications. • Long-term solution — no maintenance required on metal seat.

Two 8” ( 200 mm) Velan Securaseal ® metal-seated liquor isolation valves.

There are three ways to convert Batch cooking woodPr intoES Sfiber.urE The SEAL first A isnd Mechanical pulping processAPi 600* APi 603* APi 602* mechanical pulpingBoLTEd BonnET or V groundALVES TMPCA techniqueST STEEL VALVES STAinLESS STEEL VALVES In Smbatch cookingALL ForGE thed digesterVALVES is wood, the second is sulfite filled with chips, white cook- pulping, and the third is kraft or ing liquor, and steam to soften sulfate pulping. the wood chips. The chips are cooked for about three hours Mechanical pulping is where in this caustic atmosphere. logs are ground up in grinders or The cooking liquor absorbs refiners. There are three types the impurities and it becomes of mechanical pulping: PGW black liquor. This cooking action (pressurized ground wood); TMP destroys the bond between the (thermo-mechanical pulping), cellulose fibers and the glue-like where the logs are pre-steamed; material called lignin that ce- and TCMP (thermo-chemical- ments the fibers together. mechanical pulping), where the logs are pre-steamed with After cooking, the pulp is blown chemical treatment. into a blow tank where the shock of the material hitting the tank Sulfite pulping is where Kraft pulping process wall separates the softened sulfurous acid softens wood lignin and fibers. fibers and dissolves lignin. The Continuous cooking technique popularity of sulfite pulping is High- waning because the sulfurous pressure acid discolors paper by burning steam the fibers, the corrosion is more severe, and chemicals can’t be Low- recovered. pressure steam Kraft pulping or sulfate pulping Low- pressure is the most common pulping feeder technique and has three major cooking technologies: Two-stage diffussion continuous, batch, and Low- pressure enhanced cooking. steam

High-density High- storage tank pressure Continuous cooking feeder Two- In continuous cooking, the con- stage tinuous digester uses a heated, ﬁltrate tank pressurized chamber into which chips and chemicals are fed.

This type of digester differs from the batch type in that the chips are processed in a downward flow through zones of steadily The high-pressure feeder (the MEdiA VAlVE TyPE(1) MEdiA VAlVE TyPE(1) increasing temper-atures and heart of the digester) sends n Level tank control Securaseal® n High-pressure steam Securaseal® pressures until the cooking zone the chips to the digester inlet. n Sand separator Securaseal® Condensate Securaseal® is reached. A rotating helical screw pushes Black liquor switching Torqseal™ n Low-pressure steam Securaseal® down chips through impregna- White liquor Securaseal® n Water Memoryseal™ ® Cooking liquor is continually tion zones, where steam and Heater isolation Securaseal n Consult velan sales Department ® circulated from the digester to liquor are injected into the zones Blow flow control Securaseal for preferred valve heat exchangers, where the to cook the chips. The chips liquor is reheated and reinjected (1) for more information about other velan valves suitable for the above media remain in this area from two contact velan. into the digester. The pH of the to three hours and the mass is cooking liquors is 13.5 to 14 and cooled, mixed with black liquor, the operating temperatures are and mechanically conveyed or 240°F at 140 psi. “blown” to the blow tank.

6 Velan reserves the right to change this information without notice. © 2010 Velan Inc. All rights reserved. Enhanced cooking The major benefit is the greatly Next is deknotting, where knots, by the use of diffusion, pressure, y-PATTErn reducedST steamAinLE consumptionSS STEEL rejects, or uncooked pulp are and belt washers. The next generation of batch over a standard batch digester. taken out of the process. This VALVES KniFE GATE VALVES Finally the pulp is screened, cooking is enhanced batch is accomplished with vibrating cleaned, and thickened and then cooking where, once the cook- screens or pressure screens. ing temperature is reached, Brown stock washing sent to high-density storage spent cooking liquor is drawn Another step in this process tanks from where it can be sent through screens and is circu- The next step in the pulping is brown stock washing. This to the bleach plant or to the lated with a pump to a heat ex- process involves brown stock is where the residual liquor paper machines. changer. This liquor is displaced washers, where the brown is removed along with any with brown stock wash filtrate. stock goes through a number of contaminates in the pulp, which processes. is then sent to the evaporators The spent liquor is used to to recover the maximum amount The first step is defibering, heat the next batch of liquor or of reusable chemicals. Brown where fibers are mechanically filtrate. This type of digester is stock washing is accomplished separated. either blown with compressed air or pumped out.

Kraft pulping process Enhanced cooking technique

Brown stock washing process MEdiA VAlVE TyPE(1) MEdiA VAlVE TyPE(1) Flash steam Securaseal® n Capping valve Cap-Tight™ Digester relief Securaseal® n Blow valve Securaseal® n Direct steaming Torqseal™ n Blow back Securaseal® Check valve Gas off Securaseal® n Indirect steaming Torqseal™ n Brown stock filtrate Torqseal™ Condensate Memoryseal™ n Blow heat recovery Knife gate ® Blow line diversion Securaseal (BBKGV) High- n White liquor Securaseal® n Consult velan sales Department density n Black liquor Securaseal® for preferred valve storage

(1) for more information about other velan valves suitable for the above media contact velan.

Evaporators RecoveryAP iboiler 6d And 6A BALL VALVES

Recovery of usable chemical the wash is recovered and sent Evaporators is critical in kraft cooking. The to the evaporators. Evaporators recovery area is a loop that take the water out of the liquor to MEdiA VAlVE TyPE(1) create high-density black liquor takes the wash from the brown n Black liquor – < 50% Bonneted knife gate stock washers, evaporates the to burn in the recovery boiler. n Black liquor – > 50% High density Securaseal® water out, burns the lignin (high n ™ BTU factor), and recovers the The evaporator island may Soap Memoryseal ™ chemicals used in the cooking include as many as six effects, Tall oil Memoryseal process. where the vapor in one effect n Steam – HP (2) > 150 psi/10.3 bar Torqseal™ becomes the steam supply in the (3) ™ n Steam – LP < 150 psi/10.3 bar Memoryseal next unit. There are four types of ™ Evaporators evaporators: rising film, falling Condensate Memoryseal film, cascade, and cyclone. Water Knife gate After the blow tank, the stock Filtrate Knife gate is washed in the brown stock washer. The fibers are trans- Weakwash Knife gate ferred to the stock prep area and n Consult velan sales Department for preferred valve. (1) for more information about other velan valves suitable for the above media contact velan. (2) High pressure steam. (3) low pressure steam.

recovery boiler Heavy black liquor is pumped The organics in the liquor burn as to a black liquor storage tank fuel, while the chemicals fall to at the recovery boiler where it the bottom of the boiler and flow is mixed with salt cake (sodium out as smelt. The smelt flows into sulphate), as a make-up chemi- a dissolving tank filled with weak cal to replace the chemicals lost wash liquor from the causticizing during washing and evaporation. area. The smelt is agitated and The black liquid is pumped into recycled to break up the molten the boiler through nozzles, where smelt and prevent an explosion. the black liquor is vaporized and The liquor in the dissolving tank burned. is called green liquor. Velan metal-seated ball valves on a new evaporation installation.

Recovery boiler Causticizing Causticizing

MEdiA 1ST CHoiCE Green liquor from the dissolving MEdiA VAlVE TyPE(1) tank is pumped to the causticiz- Feed water Pressure seal n White liquor – clarified Torqseal™ ing area where it is treated with n Steam – HP Pressure seal n White liquor – unclarified Securaseal® milk of lime (calcium hydroxide), ® Drains Power ball to form white liquor. n Green liquor – clarified Securaseal Soot blower steam Power ball n Green liquor – unclarified Securaseal® n Aux. fuel (NG) Memoryseal™ As green liquor contains impuri- n Weak wash Knife gate n Aux. fuel (Oil) Memoryseal™ ties called dregs, it first must be n Dilution water Knife gate Flue gas Torqseal™ filtered in a clarifier. The clarified Weakwash Knife gate green liquor is pumped to the Natural gas Memoryseal™ n Consult velan sales Department slaker where it is mixed with for preferred valve. ™ burnt lime (calcium oxide). Fuel oil Memoryseal n Steam Torqseal™ The lime-green liquor mixture n Consult velan sales Department for preferred valve. flows to two or three causticiz- (1) for more information about other velan valves suitable for the above media ers in a series to complete the contact velan. reaction. The liquor is separated from the lime mud and becomes white liquor.

The calcium carbonate precipi- tate is burned in the lime kiln to form calcium oxide for use in the causticizing area.

Velan’s bolted bonnet bnife gate eliminates packing leaks on chemical laden fluids.

Velan’s Torqseal™ triple-offset valve has had great success in recausticizing.

The paper processes Wet end Once the stock is washed it goes either to the bleach plant or to the stock prep area. The bleach plant whitens the stock before it goes to the stock prep area. The stock prep area prepares the stock to go on the wire. The paper machine makes paper out of the stock.

Bleach plant Once the pulp is washed it goes to the bleach plant where the pulp is whitened to meet the stringent requirements of many customers.

The bleach plant is a chemical process that the pulp passes through. The bleaching process happens in sequences. Chlorination, hypochlorite, chlorine dioxide, peroxide, and oxygen are some of the sequences used in the bleaching process. Bleaching

These sequences can be used MEdiA VAlVE TyPE(1) MEdiA VAlVE TyPE(1) more than once in the process. n Consult velan sales Department n Steam Memoryseal™ n Chlorine dioxide Memoryseal™ This is a highly corrosive area of for preferred valve. ™ High alloy a mill. n Hot water Memoryseal ™ (1) for more information about other n ™ Oxygen Memoryseal Fresh water Memoryseal velan valves suitable for the above ™ n Chlorine Memoryseal™ Hypochlorite Memoryseal media contact velan. High alloy High alloy Hydrogen peroxide Memoryseal™

Stock Prep Paper machine The objectives in stock prepara- MEdiA VAlVE TyPE(1) The simplest way to explain a MEdiA VAlVE TyPE(1) tion are to process the fibrous n Stock Knife gate paper machine is that the pulp n White water Knife gate raw materials (pulp) and the Refiners Knife gate is put on a wire (Fourdrinier) and n Steam Memoryseal™ non-fibrous components (addi- Cleaners Knife gate dried to form a sheet. The fact of Vacuum Memoryseal™ tives) and combine them into a the matter is the paper machine n Steam Memoryseal™ Shower water Memoryseal™ papermaking furnish. The steps is very complex. The stock n ™ n ™ used to do this are beating and Water Memoryseal consistency basis weights are Fresh water Memoryseal n Condensate Memoryseal™ n Seal water Memoryseal™ refining, addition of additives, critical measurements in the pa- or forged steel n Condensate Memoryseal™ metering, and blending. per machine process. The stock n Consult velan sales Department is sent to a headbox, which dis- or forged steel for preferred valve. tributes the stock evenly on to a n Consult velan sales Department (1) for more information about other moving forming wire. The water for preferred valve. velan valves suitable for the above drains from the fibers by gravity (1) for more information about other media contact velan. and is dewatered by suction. The velan valves suitable for the above sheet then goes through a series media contact velan. of presses where additional water is removed. The sheet then goes through a dryer section and the rest of the water is removed.

The sheet moves on to the cal- ender section where the sheet is pressed and finished between metal rolls to reduce thickness and is then finally put onto a roll for shipment. Some of Velan’s ball, globe, check, and gate valves, used in pulp and paper The finished product—rolls of paper. applications.

VEL-CSV VEL-API-603 VEL-KGV VEL-PQCV VEL-NCP

VEL-BF VEL-MS VEL-PBV VEL-CBV VEL-VTP

VEL-BV CAT-GPBV CAT-SAS-CFLEX CAT-SAS-CCON CAT-VEL-ST

Headquartered in Montreal, Canada, Velan has several international subsidiaries. For general inquiries: © 2010 Velan Inc., Montreal, QC, Canada. All rights reserved. The contents hereof are confidential and Velan head office proprietary to Velan. Any unauthorized reproduction or disclosure, in whole or in part, is strictly prohibited. Velan 7007 Côte de Liesse, Check our website for more reserves the right to change this information without notice. Velan Valves, Velan Inc., Memoryseal, Securaseal, Torqseal, Proquip, Velflex, Adaxie, and RAMA are trademarks or registered trademarks of Velan Inc. and/or Montreal, QC H4T 1G2 Canada specific contact information. another Velan company. Stellite® is a registered trademark of Deloro Stellite Group. All other trademarks and registered trademarks are owned by their respective companies. Tel: (514) 748-7743 Fax: (514) 748-8635 www.velan.com

BRO-PP-03-10 Printed in Canada