Summary of Contents for Samson 3755
- Page 1 EB 8393 EN Translation of original instructions Type 3755 (cast aluminum body) Type 3755 (stainless steel body) Type 3755 Pneumatic Volume Booster Edition November 2017...
- Page 2 Î For the safe and proper use of these instructions, read them carefully and keep them for later reference. Î If you have any questions about these instructions, contact SAMSON‘s After-sales Service Department (aftersalesservice@samson.de). The mounting and operating instructions for the devices are included in the scope of delivery.
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Page 3: Table Of Contents
Lifting ......................19 Storage .......................19 Mounting and start-up .................20 Mounting position ..................21 Pneumatic connections..................21 5.2.1 Supply air ....................22 5.2.2 Exhaust port of Type 3755-2 .................22 Start-up .......................22 5.3.1 Adjusting the bypass restriction ..............23 5.3.2 Tuning to the control loop requirements ............23 Conversion ....................24 5.4.1 Converting Type 3755-1 to Type 3755-2 ............24 5.4.2... - Page 4 Contents Servicing.....................26 6.1 Replacing the sintered polyethylene filter disk ..........26 Preparation for return shipment ..............26 Malfunctions ....................27 Emergency action ..................27 Decommissioning and disassembly ..............28 Decommissioning ..................28 Removing the pneumatic volume booster ............28 Disposal ......................28 After-sales service ..................29 EB 8393 EN...
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Page 5: Safety Instructions And Measures
SAMSON does not assume any liability for damage resulting from the failure to use the device for its intended purpose or for damage caused by external forces or any other external factors. - Page 6 Revisions and other modifications Revisions, conversions or other modifications to the product are not authorized by SAMSON. They are performed at the user's own risk and may lead to safety hazards, for example. Fur- thermore, the product may no longer meet the requirements for its intended use. Safety features The safety function of the Type 3755 Pneumatic Volume Booster is the emergency venting on demand. Warning against residual hazards To avoid personal injury or property damage, plant operators and operating personnel must prevent hazards that could be caused in the control valve by the process medium, the operating pressure, the signal pressure or by moving parts by taking appropriate precautions. They must observe all hazard statements, warning and caution notes in these...
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Page 7: Notes On Possible Personal Injury
Î Mount the volume booster with the vent opening facing downward or to the side (exception: Type 3755-2 when the exhaust port is screwed to a pipe). Î If the volume booster can become covered in snow, iced up or dirt can collect in the device, it must be mounted with the exhaust side facing downward or protected by a suitable fixture/cover. -
Page 8: Markings On The Device
Markings on the device 2 Markings on the device 2.1 Article code Pneumatic Volume Booster Type 3755- Type Low-noise venting over a sintered polyethylene filter disk (Flanged-on) threaded exhaust port Pneumatic connections Supply air and actuator ISO 228 - G ¾, signal ISO 228 - G ¼... -
Page 9: Nameplate
Markings on the device 2.2 Nameplate SAMSON 3755 Pneumatic Volume Booster Ambient temperature range Supply max. 10 bar/145 psi Supply 2.5 m³/h Signal max. 7 bar/101.5 psi Exhaust 2.5 m³/h Output max. 7 bar/101.5 psi Dynamic set Standard Model 3755- Var.-ID... -
Page 10: Design And Principle Of Operation
Design and principle of operation 3 Design and principle of oper- 3.1 Safety function ation The safety function of the Type 3755 Pneumatic Volume Booster is the emergency The Type 3755 Pneumatic Volume Booster is venting on demand. used together with positioners to increase the positioning speed of pneumatic actuators with an effective area ≥ 1000 cm² or a travel volume ≥ 6 l. The pneumatic booster supplies the actuator... - Page 11 Design and principle of operation Connections of aluminum version: Connections of stainless steel version: Signal Supply air Output (to actuator) Exhaust air Sectional drawing of version with aluminum body: (the same principle applies to the version with stainless steel body): Signal Bypass (Supply)
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Page 12: Versions
lter disk (Fig. 2) − Type 3755-2: Pneumatic volume booster (aluminum body) with fl anged-on threaded exhaust port (Fig. 3) − Type 3755-2: Pneumatic volume booster (stainless steel Fig. 2: Type 3755-1 (cast aluminum body) body), threaded exhaust port (Fig. 4) 3.3 Accessories Screwed-on stainless steel silencer Connecting thread Item no. G 1 8504-1009 1 NPT... -
Page 13: Spare Parts/Conversion Kits
3.4 Spare parts/conversion kits Aluminum version Spare parts for bypass restriction screw Item no. Stainless steel lock nut M8x1 8350-0469 Spare parts for Type 3755-1 (sintered polyethylene filter disk) Item no. Sintered polyethylene filter disk 0550-0825 Stainless steel retaining plate 0500-1401 Stainless steel M5x16 fastening screw... -
Page 14: Technical Data
Design and principle of operation 3.5 Technical data Type 3755-1 Type 3755-2 Type 3755-2 Pneumatic volume booster Aluminum body Stainless steel body Flow coefficients Supply 2.5 m³/h Exhaust 2.5 m³/h Bypass 0.3 m³/h Closed loop control Pressure ratio: 1 : 1 signal to output Response pressure Standard temperature range: 80 mbar... - Page 15 Seat-plug seal Other seals Other external parts 1.4404 Exhaust side facing downward or to the side The following applies for Type 3755-2: body IP 66; the IP rating depends on how the venting is implemented (pipe, silencer etc.). EB 8393 EN...
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Page 16: Dimensions In Mm
Design and principle of operation 3.6 Dimensions in mm 3.6.1 Aluminum version Type 3755-1 with sintered Ø 120 polyethylene filter disk for low-noise venting Ø 105 Type 3755-2 Flanged-on threaded exhaust port connected to a pipe EB 8393 EN... -
Page 17: Stainless Steel Version
Design and principle of operation 3.6.2 Stainless steel version 11.5 max.190 SW46 Ø90 EB 8393 EN... - Page 18 EB 8393 EN...
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Page 19: Measures For Preparation
1. Remove the packaging from the volume improper storage. booster. Observe storage instructions. Contact 2. Dispose of the packaging in accordance SAMSON, if need be. with the valid regulations. Storage instructions NOTICE − Protect the volume booster against exter- Risk of damage to the volume booster due to nal influences (e.g. impact, shocks, vi-... -
Page 20: Mounting And Start-Up
Mounting and start-up 5 Mounting and start-up To meet the requirements of safety instru- mented systems (SIS), a solenoid valve can Î Mount the volume booster with the com- also be connected between the pneumatic pressed air flowing from the supply port volume booster and the pneumatic actuator to the actuator port as indicated by the (Fig. 6). -
Page 21: Mounting Position
The air connections for signal, supply, actu- booster. ator and the flanged-on threaded exhaust No substances must be allowed to enter the port of Type 3755-2 are designed with G or device during mounting, transport or stor- NPT threads (see article code on age. -
Page 22: Supply Air
(max. 10 bar). 5.2.2 Exhaust port of Note Type 3755-2 The Type 3755 Volume Booster is suitable for actuators with an effective area ≥ 1000 cm² or a travel volume ≥ 6 l. WARNING High sound pressure level! Risk of damage On starting up the volume booster, keep the to hearing. -
Page 23: Adjusting The Bypass Restriction
Mounting and start-up 5.3.1 Adjusting the bypass 5.3.2 Tuning to the control restriction loop requirements For a stable loop performance, the bypass The bypass setting can be changed, if re- restriction must be adjusted to meet the con- quired. To do this, change the position of the trol loop requirements: bypass restriction screw gradually by half turns and correct the control parameters of... -
Page 24: Conversion
(1) in a crisscross pattern with Before opening the volume booster, put it out 4.2 Nm tightening torque at the maxi- of operation. mum. 5.4.1 Converting Type 3755-1 to Type 3755-2 1. Unscrew the eight M5x16 screws (1) and remove the retaining plate (2) from the body. 2. Remove sintered polyethylene filter disk (3). - Page 25 Mounting and start-up Fig. 7: Type 3755-1: low-noise venting Fig. 8: Type 3755-2: flanged-on over a sintered polyethylene filter threaded exhaust port disk M5x16 screw Retaining plate Sintered polyethylene filter disk M5x25 screw Screwed flange O-ring EB 8393 EN...
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Page 26: Servicing
The volume booster was checked by ing towards the device. SAMSON before it left the factory. 4. Refasten the retaining plate (2) on the − The product warranty becomes void if ser- body, tightening the eight M5x16 screws vice or repair work not described in these (1) in a crisscross pattern with 4.2 Nm... -
Page 27: Malfunctions
Note If other malfunctions occur, contact SAMSON's After-sales Service department. 7.1 Emergency action Upon failure of the air supply, the positioner vents the actuator over the volume booster, causing the valve to move to the fail-safe po- sition determined by the actuator. -
Page 28: Decommissioning And Disassembly
Decommissioning and disassembly 8 Decommissioning and disas- 2. Detach the pipe fittings. sembly 3. Remove the volume booster from the pipeline. WARNING 8.3 Disposal Risk of bursting in pressure equipment. Control valves, mounting parts and pipelines Î Observe local, national and internation- are pressure equipment. Improper opening al refuse regulations. -
Page 29: After-Sales Service
You can reach the After-sales Service De- partment at aftersalesservice@samson. Addresses of SAMSON AG and its subsid- iaries The addresses of SAMSON AG, its subsid- iaries, representatives and service facilities worldwide can be found on the SAMSON website or in all SAMSON product catalogs. - Page 32 EB 8393 EN SAMSON AKTIENGESELLSCHAFT Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 samson@samson.de · www.samson.de...