Valtek Rack & Pinion and Scotch Yoke Actuators Technical Brochure
18Pages

Rack & Pinion and Scotch Yoke Actuators

Flowserve is the World’s Premier Provider of flow management services. Flowserve manufactures actuators and accessories to provide full service valve and damper automation to the worldwide oil and gas, pulp and paper, chemical, processing and energy related industries. We provide maximum value to the end user through a broad offering of products, services, application engineering and our systematic approach to automation. Valtek Control Products Springville, Utah ® Sales and service facilities are strategically located in industrial centers throughout the world.

Quality, Dependability, and Productivity. Recognized as the leader in control systems, Valtek’s pneumatic actuators can automate valves with torque values from 25 to 500,000 in-lb. Actuators are available in a wide range of materials suitable for use in the most demanding applications. Flowserve also offers a comprehensive range of NAMUR Controls and accessories such as lockout modules and gear overrides. To complete the package Flowserve can provide engineering design services for SureGrip™ valve couplings. SuperNova VB-Series Page 4-7 Controls & Accessories Page 9 Stainless Steel...

Spring Return Rack & Pinion Actuators are designed for automating butterfly, eccentric rotary plug or ball valves and dampers. The actuators incorporate a precision-extruded hard anodized aluminum body and a one-piece nitride-coated pinion gear, factory lubricated for a long trouble-free life. Actuators are designed for 100-degree travel with clockwise and counterclockwise travel adjustment for open and closed positions. Actuators are convertible to a double acting or a spring return simply by removing or adding springs, while utilizing the same body and end caps. Available in torque ranges...

Double Acting (No Spring) NAMUR mounting dimensions on actuator accessory holes and drive shaft. Flats on pinion drive shaft accommodates wrench overrides and accessories. NAMUR mounting dimensions on actuator pneumatic port connections. Upper and lower pinion bearings extend life. Precision die cast pistons with large cylinder bearings increase efficiency and cycle life. Full length gear engagement between piston rack & nitride-coated pinion. Integral travel stops in both directions with 10 degrees of overtravel to assure precise adjustment of both the open and closed positions.* *Outward...

Torque Outputs Air Supply Spring Spring Group For additional air supply pressures, consult factory or your AutoSize software program. Spring Chart VB050 ➁ Spring Combination ➀ #1 Spring #2 Spring #3 Spring (inner) (low rate outer) (high rate outer) 1➂ 1➂ 2 2 1 1 2 2 2 2 2 Note: ➀ #1 Spring has one color code dot #2 Spring has two color code dots #3 Spring has three color code dots ➁ VB050 has maximum of 2 springs per endcap ➂ Install springs on opposite sides VSNA250-VSNA300 Spring Combinations Spring number is total number of springs in endcaps. There should never be a difference in...

Flow Control Division Valtek Control Products © Actuator shown in the full clockwise (CW) position as viewed from top. © Accessory mounting holes not for gear override or stop block. Cycle times under no load conditions. Air line size, air capacity and valve torque characteristics affect these cycle times. Faster or slower cycle times can be accomplished using special control components. ©Consult torque charts or AutoSize for applicable spring combinations. Example: A model VB100 spring return (FCW) spring set 10, would be coded as VB100S10

Flow Control Division Valtek Control Products SliperNova Models VSNA250 & VSNA300 90° Units

Accessories A25N Directional Valve* The Valtek Directional Valve mounts directly to SuperNova series actuators which eliminates the cost of tubing and fittings. The valves are available for double acting and spring return actuators with NEMA 4X, 7 & 9, or intrinsically-safe and low power solenoid operators. These valves have been tested and proven reliable for over 1 million cycles. “Pharos” NAMUR Indicator * Provides an economical solution for positive visual indication of the actuator position. Constructed of tough industrial engineered resin, the UltraIndicator can be used on actuators...

VSXL Series Stainless Steel The VSXL Series utilizes a 316 series stainless steel body and is ideal for use in corrosive environments. It is available in both Double Acting and Spring Return versions with a maximum double acting torque output of 7,279 in-lbs. The VSXL Series can be supplied with stainless steel or aluminum pistons and springs per customer requirements and is also available with optional polished finishes for sanitary applications. Flats on Pinion Drive Shaft accommodates manual overrides and accessories. NAMUR mounting dimensions on actuator accessory holes and drive shaft....

VSXL Series Dimensions Actuator shown in the full clockwise (CW) position as viewed from top. Accessory mounting holes not for gear override or stop block. Use studs only to mount. Bolts not recommended. Cycle times under no load conditions. Air line size, air capacity, and valve torque characteristics affect these cycle times. Faster or slower cycle times can be accomplished using special control components. CYCLE TIME (Select Bold Type Code from each column that applies) Type Springs (Select One) D Double Acting 04 S Spring Return (FCW) 05 C Spring Return (FCCW) 06 07 08 09 10 11 12 Seals...

Heavy Duty Valtek has a complete line of scotch yoke, heavy duty rotary actuators, which has a unique bearing design to provide higher efficiencies and longer life. • Pneumatic, Gas and Hydraulic Models • Double Acting, Spring Return and “Fail-Safe” • On-Off, Multi-position and Throttling • Pressure Ranges from 40 psi to 150 psi • Torque Outputs: Standard Design from 1000 to 170,000 in-lbs • Overrides, Special Controls, Line Break Controls, etc. Piston Seals The pneumatic series actuators utilize a quad seal. This seal has proven dependable in years of trouble-free service. Scotch Yoke The...