Double and Single Acting Pneumatic Quarter-turn Actuators with Flexible Valve and Accessory Mounting

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1 Morin MRP Pneumatic Rack and Pinion Actuators Tyco_Actuator_MRP_KVUDD0128_D301 Pneumatic Quarter-turn Actuators with Flexible Valve and Accessory Mounting Features Full bearing support on every moving part for increased cycle life. Pinion bearings located at the top and bottom support the actuator-valve interface to resist sideloads from misalignment of mounting brackets. Standard with ISO 5211 (DIN 3337) mounting, available with many other interfaces to suit the valve top works giving it the most flexible mounting in the industry. Top accessory pad has both the Tyco standard and NAMUR mounting pad allowing direct mounting of Tyco accessories using ModMount or with the male NAMUR shaft kit, allowing mounting of any NAMUR standard accessories. Identical envelope dimensions for spring return and double acting models. Hard anodized body provides high wear resistance and long service life. Body and chromated end caps are then Electrostatic Powder Coated as standard, providing levels of corrosion protection others offer only as optional. One-piece heat-treated steel pinion provides the strength and corrosion resistance necessary for today s demanding actuation requirements. Dual travel stops standard to allow adjustment at both ends of the stroke. Standard open adjustment range of 82 to 98 rotation, including an over travel of +/-4 and an under travel of +/-4. The NAMUR pattern directional control valve mounting pad allows all NAMUR standard valves to direct mount to the actuator. Total Flow Control Solutions General applications: Technical data For pneumatic control of any quarterturn valve application. Maximum supply pressure : 150 psig Options: Special Nickel Protection for difficult services. Rated supply pressure : 120 psig Output torque@120 psig : 13,523 lb. in. Temperature range (F) : -20 to 210 Optional temperature ranges available (F) without notice. Copyright 2001 by Tyco International Ltd. : -15 to 300 : -40 to 160 -EN-0106

2 Materials of Construction Materials of Construction Part Material U.S. Material Std. DIN Material Std. 1 Body Extruded aluminum (hard anodized and ESPC*) ASTM B221 DIN Travel Stop 304 stainless steel ASTM A193 3 Indicator ABS 4 Pinion Shaft Carbon steel (sealbond N coated) ASTM A108 C40 5 O-rings Nitrile 6 Bearings Engineered polymer - Devlon Die-cast aluminum 7 Piston LM6 or LM24 ASTM B85 DIN or 226 (anodized) 8 Springs (spring return) Spring steel ASTM A877 BS 2803 Die-cast aluminum 9 End Cap LM6 or LM24 ASTM B85 DIN or 226 (chromated and ESPC*) 10 Fasteners 304 stainless steel ASTM A193 DIN 267 Part 3 * ESPC Electrostatic Powder Coat Optional Special Nickel Protection (SNP) For those harsh environments where even our tough, standard electrostatic powder coating can be overcome, MRP offers the option of Special Nickel Protection. Used in difficult services including caustic wash downs in food and beverage operations, salt air environments in coastal regions, high humidity zones such as cooling towers, and many others, this option provides some of the highest levels of protection obtainable in pneumatic rack and pinion actuators. The MRP with SNP is protected by the nickel process both inside and out, including the pinion, using a proprietary chemical process. without notice. Copyright 2001 by Tyco International Ltd. 2

3 Operation ISO/DIN Valves Shaft Adaptation The Morin MRP Rack and Pinion actuator offers unsurpassed flexibility in mounting options. The design provides a common sense approach to the multiple shaft designs allowed by ISO. The MRP addresses the complexity of this standard with a standard of it s own and offers a comprehensive range of adapters to suit many of the ISO standard shafts on the market today. This allows the MRP to be used on differing valve shaft designs in the same plant without having the same size actuator models with different pinions. Actuator Mounting pad of the Morin MRP: The dual-keyed input shaft allows parallel or perpendicular mounting to the valve flow and is designed to accept the desired ISO adapter sleeve. A comprehensive range of adapter sleeves is available to suit many valve stems. ISO EN Square Adapter Sleeve ISO EN Flat Head Adapter Sleeve Actuators Both the double acting and spring return MRP actuators feature a compact design with the same envelope dimensions. This flexible unit can be converted from double acting to single acting in the field without special charts to decipher color codes on which springs to use. The spring return actuator is available with spring sets from 40 pounds to 80 pounds in 10 pound increments. The springs are manufactured from heavy gauge wire to assure long life and corrosion resistance. Standard Double Acting To OPEN Valve: In a double acting application, air pressure is introduced to Port B, pressurizing the space between the pistons and driving the pistons out towards the actuator ends. The volume of air above the piston heads is exhausted to atmosphere. This causes the piston racks to drive the pinion in a counterclockwise direction, resulting in a quarter-turn rotation. This rotation is transferred to the valve shaft, opening the valve. To CLOSE Valve: Air pressure introduced to Port A, pressurizing the spaces above each piston head and driving the pistons inward. The volume of air between the pistons is exhausted to atmosphere. This causes the piston racks to drive the pinion in a clockwise direction, resulting in a quarter-turn rotation. This rotation is transferred to the valve shaft, closing the valve. Spring Return To OPEN Valve: In a single acting application, air pressure is introduced to Port B, pressurizing the space between the pistons and driving the pistons out towards the actuator ends while at the same time compressing the springs. This causes the piston racks to drive the pinion in a counterclockwise direction, resulting in a quarter-turn rotation. This rotation is transferred to the valve shaft, opening the valve. To CLOSE Valve: When the air pressure is relieved, the spring tension moves the pistons inward and exhausts the air through Port B. This causes the piston racks to drive the pinion in a clockwise direction, resulting in a quarter-turn rotation. This rotation is transferred to the valve shaft, closing the valve. * 037 and larger ISO models have dedicated Star drives. without notice. Copyright 2001 by Tyco International Ltd. 3

4 Travel Adjustments Within the mechanical connections of the drive between the valve and the MRP actuator there are several points of manufacturing tolerance, including valve disc or ball to stem, stem to adapter and adapter to actuator that must be compensated for in the operation of the assembly. Therefore, adjustment is necessary to ensure that valve operation is as precise as required. With the MRP, Dual travel stops allow adjustment at both ends of the stroke. Maximum adjustment range of 82 to 98 rotation, including an over travel of +/-4 and an under travel of +/ The standard travel stops also provide the desired adjustment necessary for proper operation of various valve types, as detailed. Resilient seated butterfly valves Shut-off occurs before the disc has rotated a full 90 from the open position. Travel adjustment is therefore desirable to prevent over travel, which would result in unnecessary operating torque and premature deterioration of seat life. In the open position, adjustment is necessary to ensure maximum flow through the valve and minimum dynamic forces acting on the disc. High performance butterfly valves The double offset design of high performance butterfly valves results in the disc moving into the seat with a camming action. It is important that the disc does not travel beyond the seat position, otherwise damage to the seat will occur. Ball and Plug valves The ball or plug must be precisely in line with the valve port to prevent damage to the seat in the open position. Adjustment at the closed position is necessary to ensure that complete shutoff is achieved. MRP actuators have over travel adjustment of 4 +/- one degree and under travel adjustment of at least 4, making them ideally suited for all quarter turn valve designs. without notice. Copyright 2001 by Tyco International Ltd. 4

5 Torque OutPut and Characteristics Double Acting models produce a constant level of torque output throughout the piston travel With Spring Return models, energy is used to compress the springs on the air stroke and the output torque consequently reduces throughout the travel. Conversely, on the spring stroke, the energy of the spring diminishes as travel progresses, similarly reducing the output torque. When sizing actuators it is important to take into account the end of air and end of spring torques. Torque % of maximum Torque % of maximum Angle of opening Ball and Plug Valves Angle of opening Butterfly Valves Output Torques (lb. in.) Double Acting - Air to Air Actuator Air Supply (psig) Model Output Torques (lb. in.) Single Acting - Spring Return Actuator Air Supply (psig) Model Break End Break End Break End Break End Break End Break End Break End Break End Unbalanced air and spring torques available on Bulletin Torque Characteristics Ball, butterfly and plug valves also vary in the characteristics of their torque curves. Ball and Plug Valves: A ball valve, having seats loaded onto the ball, experiences a level of break out torque on opening, followed by a relatively low run torque, before an increase as the ball reaches the closed position. The torque curve for standard plug valves tends to be similar to that of ball valves, but with a higher run torque. Butterfly Valves: A butterfly valve has a steeper torque decline and a lower run, due to its lack of contact with the seat. The effect of flow, however, produces dynamic torque increase as the disc moves towards the open position. Service Factors: The torque required to drive a valve varies markedly with application conditions. A quoted valve torque will normally assume frequent operation on a clean, lubricating fluid, at ambient temperature. If the valve is to be used infrequently, is on a dry application, on fluid with particulate content, at high or low temperature or is to be used for emergency shut-down service, for example, correction factors must be added to the valve torque requirements. The valve manufacturer should be consulted to verify the extent of such correction factors. For example: (Valve Sizing Torque x K-Factor = New Valve Sizing Torque) Typical correction factors Frequent use, lubricating clean fluid K = 1.0 Infrequent use (less than once per month) K = 1.5 Emergency shut down (once per year) K = 2.0 Dry gas K = 1.25 Paste, resin, slurry, etc K = 1.5 Fluids with abrasive particles K = 2.0 without notice. Copyright 2001 by Tyco International Ltd. 5

6 Sizing Actuators Sizing Actuators must be sized to have a torque output equal to, or greater than, the required valve torque, taking into account unseating, run travel and reseating, where applicable. 1. Determine anticipated valve torque: To select the most appropriate actuator size for any given valve, it is necessary to determine the anticipated operating torque for that valve. This should be obtained by consultation with the valve manufacturer and by taking account of the particular circumstances of the application, as noted above. The valve manufacturer will often include a safety margin in such data, so as to allow for inevitable variances encountered during manufacture. 2. Determine air supply pressure: Determine the minimum air supply pressure, which will be available at the installation. Using this, or the nearest supply pressure shown on previous page, select the actuator as follows. 3. Double acting models: Using the chart on page 5, select the actuator which will provide the nearest torque output above the anticipated torque of the valve (+ safety factor). 4. Spring return models: Determine the desired failure mode, then determine the critical torque points for the subject valve using table. Using the chart on page 5, select the actuator which will provide the nearest torque output (both start and end of spring ) above the anticipated valve torque (+ safety factor). Valve Type Required Failure Mode Critical Torque Points Butterfly Valve Fail Closed Start of air torque End of spring torque Fail Open Start of spring torque End of air torque Ball Valves Fail Closed End of air (full open) torque End of spring (reseating) torque Fail Open End of spring (open) torque End of air (reseating) torque Mechanical Data Piston Double Acting Spring Return Displacement (in 3 ) Operating Times Operating Times Actuator Open-Double Acting Close (seconds) (seconds) Weight Model Air Stroke - Spring Return Double Acting Stroke Time Air Stroke Spring Stroke Lbs without notice. Copyright 2001 by Tyco International Ltd. 6

7 Dimensions ISO/NAMUR Options Actuator Envelope Dimensions 16.0 M6 x 12 Dp A Travel Bolts E 11.0 A/F B C Note: Adapter kit to provide NAMUR top mount accessory drive is available. Bracket not included. F F G D Model A B C D E F G Actuator Mounting Dimensions Model Shaft Bore Keyway Mounting Pattern Mounting Holes ISO Square H J Key Width ISO PCD Z F x 1 /4-20 UNC x 0.38 Dp 14 mm F x 5 /16-18 UNC x 0.56 Dp. 17 mm F x 5 /16-18 UNC x 0.56 Dp. 17 mm F x 3 /8-16 UNC x 0.56 Dp. 19 mm 037 see note 2 F x 3 /8-16 UNC x 0.56 Dp. 22 mm 045 see note 2 F x 3 /8-16 UNC x 0.56 Dp. 22 mm 070 see note 2 F x 1 /2-13 UNC x 0.63 Dp. 27 mm 088 see note 2 F x 1 /2-13 UNC x 0.63 Dp. 27 mm J 1. Mounting dimensions for the Tyco Direct Mount available on KVUDD EN. 2. Models 037 through 088 will not have inserts. The drive shafts are machined with ISO star patterns. Z H Mounting Pattern Solenoid Valve Mounting Pad 1 /4 NPT x 0.45 Dp. #10UNF x 0.30 Dp. 8 Holes Top Mount Accessory Pad Dimensions Model Shaft Bore Keyway H1 J1 Key Width ( 3 /16 Square Key) ( 1 /4 x 3 /16 Key) ( 1 /4 x 3 /16 Key) ( 1 /4 x 1 /4 Key) ( 1 /4 x 1 /4 Key) ( 1 /4 x 1 /4 Key) ( 1 /4 x 1 /4 Key) ( 1 /4 x 1 /4 Key) M5 x 0.30 Dp., 8 Holes without notice. Copyright 2001 by Tyco International Ltd. 7

8 Morin MRP Pneumatic Rack and Pinion Actuators Control Accessories Tyco Valves & Controls has a complete range of control accessories available, for integration with the MRP actuators to achieve complete process control, from simple on/off solenoid valve control to integrated Network systems. Solenoid Valves A comprehensive range of solenoid valves is available for controlling the pneumatic supply to the actuator by means of an electrical signal. Alternative specifications of solenoid valves include: Weatherproof to NEMA 4, 4X Explosion proof to NEMA 4, 7, 9 Intrinsically safe to Class I A, B, C, D, Class II E, F G, Div. 1 and 2 AVID Position Monitors The AVID range of Position Monitoring equipment offers models for all service classifications, each model incorporating numerous user-friendly features, including HiVue Local Visual Display, EasiFix Switch Adjustment and ModMount Assembly facilities. K-Block Position Monitor XA Position Monitor K-Switch Quarter-turn Position Indicator ZR and ZR PLUS Position Monitors AVID Analog Positioners The AVID range of Control Positioners offers a variety of solutions to the precise positioning of rotary and linear pneumatic actuators. These positioners are suitable for use with either double acting and spring return actuators, and are mounted to the actuator housing either directly with ModMount or NAMUR (VDI/VDE 3845) standards. These units also provide the simplest form of installation and calibration as standard, without the requirement for additional equipment. Model 7874 Pneumatic Positioner EaziCal IR Analog Positioner SmartCal Intelligent Positioner Network Solutions Using the extensive resources of the AVID product range, Tyco Valves & Controls is able to provide actuated valve packages, capable of integration within field communications networks and interfacing with the major Network protocols currently in use throughout process industries. The AVID range on PlantNet Monitors facilitates communication with AS-Interface, DeviceNet and Profibus Network Protocols to enable complete system integration of all valve units. Other protocols available on request. Flow Control Tyco Valves & Controls The data presented in this bulletin is for general information only. Manufacturer is not responsible for acceptability of these products in relation to system requirements. Patents and Patents Pending in U.S. and foreign countries. All rights reserves. Printed in U.S.A. without notice. Copyright without notice. Copyright 2001 by Tyco International Ltd. 8