Forbes Marshall Pneumatic Actuator. Series MSP and SSP

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Eustace Mills
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1 Forbes Marshall Pneumatic Series MSP and SSP

Multi Spring (MSP Series) Forbes Marshall Pneumatic Diaphragm Protective cap housing Spring Diaphragm plate Diaphragm O ring spindle Yoke Stroke scanning lever Lift plate The Forbes Marshall

The compressed spring ensures that the pneumatic actuator always achieves fail safe condition on air failure without any additional intervention.

2 Multi Spring (MSP Series) Forbes Marshall Pneumatic Diaphragm Protective cap housing Spring Diaphragm plate Diaphragm O ring spindle Yoke Stroke scanning lever Lift plate The Forbes Marshall pneumatic actuators can be opened or closed using spring force or control air. These actuators are field reversible and available with either single spring or multi spring options. The compressed spring ensures that the pneumatic actuator always achieves fail safe condition on air failure without any additional intervention. The actuator positions the control valve plug upon receipt of proportional signal through the positioner. These can be operated in to Open (ATO) function or with reverse action to Close (ATC) function. Multi-Spring (MSP) has additional advantage of compact design with low installation height, which is preferred by Industry. Single Spring (SSP Series) Cap Adjustment bolt Spring Diaphragm Diaphragm plate spindle Lift plate Yoke Temperature range Optional Max. allowable pressure supply connection -20ºC to 80ºC (-4ºF to 170ºF) -40ºC to 80ºC (-4ºF to 170ºF) 6 Bar (87 psig) ¼ NPT (½" available on request) Travel mm MSP Inch SSP

MSP Series - Features Yoke with Integral Duct Diaphragm Stroke Scanning Lever inlet Stroke scanning lever The yoke of the FM MSP Series actuator has a precision internal integrated path for passage

This advanced technology eliminates the need for any additional tubing for mounting the positioner on the yoke, thereby arresting extra impulse tube leakages, chances of damage during transit, it

3 MSP Series - Features Yoke with Integral Duct Diaphragm Stroke Scanning Lever inlet Stroke scanning lever The yoke of the FM MSP Series actuator has a precision internal integrated path for passage of instrument air to the actuator diaphragm through the actuator housing. This advanced technology eliminates the need for any additional tubing for mounting the positioner on the yoke, thereby arresting extra impulse tube leakages, chances of damage during transit, it allows high operational reliability, precision and serviceability. The positioner shaft engages with the stroke scanning lever of the actuator (as shown in the diagram), thereby eliminating the need for external linkages. This design improves operational reliability, precision and serviceability. This design hence reduces maintenance costs for the user. Field Reversible at Site In In Fig. A ( to Open) Fig. B ( to Close) The MSP series pneumatic actuator allows easy reversal of the actuator at site with minimum manual intervention and without opening the actuator housing. Special plugs for aerating and bleeding ensure the highest possible protection against ingress of water and dust particles into the actuator housing.

4 MSP Series Cross Sectional View

5 MSP Series Parts List Sr. No. Component Material of Construction Handwheel 1 Rod/Tie Rod SS410 2 Intermediate Coupler SS304 3 Stopper SS410 4 Guiding Coupler AL. Bronze 5 Snap ring Spring Steel 6 DuBush Steel+PTFE 7 Needle roller bearing Chrome Steel 8 Locking Clutch SS Snap ring Spring Steel 10 Spindle SS Locator Ring SS Hex Bolt A193 B8 13 Outer Coupler SS Rod Seal Polyurethane 15 BSP Connector SS Cap with Vent Hole Polypropelene 17 Ring SS O Ring Nitrile Rubber 19 O Ring Nitrile Rubber 51 Spring Housing Carbon Steel-CRCA14 52 Spring Spring Steel 53 Diaphragm Nitrile Rubber 54 Diaphragm Plate Carbon Steel-CRCA14 55 Bush SS Hex Bolt A193 B8 57 Cup SS 440C 58 Cover Carbon Steel-CRCA14 59 O Ring Nitrile Rubber 60 O Ring Nitrile Rubber 61 DuBush Steel+PTFE 62 Rod Seal Polyurethane 63 Nut Support SS 316 Ti 64 Spindle SS Lever A 351 CF8 66 Support SG Iron 67 Lift Plate SS304 Spare parts Available spares are common for both to Open and to Close actuators Spare kit 14, 18, 19, 53, 59, 60, 61, 62 Repair kit 18, 19, 53, 59, 60, 61, 62, 63, 64

6 Multi Spring (MSP Series) D to Open Stroke mm/ inch MSP / 0.8 No of springs Pressure Control Force from to Bar / psig Kgf / Lbf / / / / / / 1079 E+HW E MSP-1-30 (Pre-Loading) MSP / / / / 29 3 / / / / / / / / / / / 1124 MSP / / / / / / / 2923 Dimensions and Weight Stroke E E+HW D Weight with HW mm/inch kgs/lbs MSP-1 20/ / / / / / / 35 MSP-2 30/ / / / / 92 60/ / / / / 103 MSP-2-60 (Pre-Loading) / / / / / / / / / / / / / / / / / / 1124 MSP-1-20 MSP-1-30 MSP-2-30 MSP-2-60 Diaphragm Area (cm²/inch²) 320 / / MSP / / / / / / / / / / 3148 to Close MSP / 0.8 MSP-1-30 MSP-2-30 Minimum Bar / psig Stroke No of Pressure 2 / 29 3 / / 58 5 / / 87 springs mm/inch Bar / psig Control Force Kgf / Lbf 30 / 1.2 MSP / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / 2743

SSP Series - Features Spring Adjustable At Site Aluminium Housing Housing Adjustment Bolt An adjustment bolt has been used to adapt the spring pre-load with actuating forces required with pinpoint

The setting is possible at site as well. High accuracy is achieved by rotating the adjustment bolt after opening the actuator cap.

The actuator housings are made from high grade aluminium which protects it from atmospheric corrosion. This feature allows the SSP series actuator to be used for marine environments.

7 SSP Series - Features Spring Adjustable At Site Aluminium Housing Housing Adjustment Bolt An adjustment bolt has been used to adapt the spring pre-load with actuating forces required with pinpoint accuracy. FM SSP Series of actuators come with different centric springs and spring ranges which allow a very broad range of actuating forces to be optimally set. The setting is possible at site as well. High accuracy is achieved by rotating the adjustment bolt after opening the actuator cap. The bolt can be rotated both clockwise and anti-clockwise depending on requirement. This is possible on-line as well. The actuator housings are made from high grade aluminium which protects it from atmospheric corrosion. This feature allows the SSP series actuator to be used for marine environments. Aluminium construction makes this actuator extremely lightweight as well. Field Reversible at Site In In Fig. A ( to Open) Fig. B ( to Close) The SSP series pneumatic actuator allows easy reversal at site with minimum manual intervention and without opening the actuator housing. Special plugs for aerating and bleeding ensure the highest possible protection against ingress of water and dust particles into the actuator housing.

8 SSP Series Cross Sectional View

9 SSP Series List of Parts Sr. No. Name of Part Material of Construction Handwheel 1 Handwheel Alumunium Alloy 2 Castle Nut A194 Gr 4 3 Split Pin SS304 4 Bush SG Iron 5 Needle Roller Bearing Set Chrome Steel 6 Spindle A276 SS410 7 Clamp Ring C20/AISI Handwheel Support Alumunium Alloy 21 Slide Bearing Bronze Filled Ptfe 22 Needle Roller Bearing Set Chrome Steel 23 Adjustment Bolt A276 SS410, 24 Spring Plate Gray Cast Iron 25 O-ring Silicone Rubber 26 Spring Spring Steel 27 Spring Housing Alumunium Alloy 28 Diaphragm Cover Alumunium Alloy 29 Spindle A276 SS Hex Hd Bolt A194 Gr 4, Zinc Plated 31 Diaphragm Nitrile Rubber 32 Diaphragm Plate Alumunium Alloy 33 Diaphragm Housing Alumunium Alloy 34 Hex Lock Nut A194 4, Zinc Plated 35 O Ring Silicone Rubber 36 Hex Hd. Bolt Full Threaded A193 B8 37 Bush A276 SS Lift Plate A276 SS Support SG Iron Spare parts Available spares are common for to Open and to Close actuators Spare kit 21, 25, 31, 35 Repair kit 21, 25, 26, 30, 31, 32, 35, 37

10 Single Spring (SSP Series) Opening Function ( to Open-Spring to Close) E+HW E Dimensions and Weight SSP-1 SSP-2 SSP-3 D Stroke E E+HW D mm/inch Weight with HW kgs/lbs 20/ / / / / 42 30/ / / / / / / / / / / / / / / / / / /4 SSP-1-20/30 SSP-2-30/60 SSP-3-60/100/120 Diaphragm Area (cm²/inch²) 320 / / / SSP-1-20/30-S SSP-1-20-R SSP-1-30-R SSP-2-30-S SSP-2-30-R SSP-2-60-S SSP-2-60-R SSP-3-60-S SSP-3-60-R SSP S SSP R SSP S SSP R from Spring to Control force Bar / psig Kgf / Lbf 0.2 / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / 1852 Closing Function ( to Close-Spring to Open) Stroke (mm/inch) Spring Bar / psig 2.8 / / / / / / / / 87 Control Force Kgf / Lbf SSP-1-20/30 20/0.8 30/ bar 560 / / / / / / / / 3417 SSP-2-30/60 30/1.1 60/ / / / / / / / / 7772 SSP-3-60/100/120 60/ / / psig 2540 / / / / / / / / 15543

11 Multi Spring Maximum allowable differential pressure for metal seated valves with parabolic trim for Class IV shutoff F1100 & F1200 Series MSP 1-20 Pressure to Open 1/ / /2 PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 50/ / / / / / / /261 18/261 15/217.5 MSP 1-30 MSP 2-30 MSP 2-60 Pressure PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 6/87 4/58 3.5/ / / / / / / / / /55.2 MSP 1-20 MSP 1-30 MSP 2-30 MSP 2-60 Pressure Pressure supply to Close 1/ / /2 PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 3 / / / / / / / / / / / / / / / / / / / / / / / 87 50/ / / / / / / / / /725.2 supply PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 3 / / / / / / / / / / / / / / / / /261 16/232 11/ / / / / / / / 87 50/ / / / / /60.9 3/ / / / / / / / / /159.5 F1300 Series MSP 1-20 MSP 1-30 MSP 2-30 MSP 2-60 Pressure to Open 1 1 1/ PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 80.1 / / / / / / / / / / / / / / / / / / / / 55.2

12 F1300 Series MSP 1-20 MSP1-30 MSP 2-30 MSP 2-60 Pressure supply 3 / / / 87 3 / / / 87 3 / / / 87 3 / / / 87 to Close 1 1 1/ PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 80.1 / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Single Spring F1100, F1200, Series SSP-3-60 SSP SSP-3-60 SSP Spring Type Standard Reinforced Standard Reinforced Spring Spring Supply Maximum allowable differential pressure for metal seated valves with parabolic trim for Class IV shutoff to Open PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 6.8/ / / / / / / / / / / / / / / / / /15.9 1/ /11.6 to Close PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite PTFE Graphite 3 / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Forbes Marshall Krohne Marshall Forbes Marshall Arca Codel International Forbes Solar Forbes Vyncke Forbes Marshall Steam Systems 480,California Avenue, Suite 102,P.O. Box Palo Alto CA California, USA Tel: / Fax: / Forbes Marshall Canada Inc Matheson Blvd East, 8th Floor Mississauga, ON L4W 5K4 Tel: Fax: fm.usa@forbesmarshall.com, ccmidc@forbesmarshall.com A-34/35, MIDC H Block Pimpri, Pune INDIA. Tel : 91(0) , Fax : 91(0) CIN No.: U28996PN1985PTC All rights reserved. Any reproduction or distribution in part or as a whole without written permission of Forbes Marshall Pvt Ltd, its associate companies or its subsidiaries ( FM Group ) is prohibited. Information, designs or specifications in this document are subject to change without notice. Responsibility for suitability, selection, installation, use, operation or maintenance of the product(s) rests solely with the purchaser and/or user. The contents of this document are presented for informational purposes only. FM Group disclaims liabilities or losses that may be incurred as a consequence of the use of this information. DOC#FMAINTOPS/0217/1008/V3.R0

Forbes Marshall Control Valve. Operational Economy with Optimum Control

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