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Summary of Contents for Samson 2335
- Page 1 EB 2552-2 EN Translation of original instructions Type 2335 Excess Pressure Valve with Pilot Valve Self-operated Regulators Edition July 2021...
- Page 2 Note on these mounting and operating instructions These mounting and operating instructions assist you in mounting and operating the device safely. The instructions are binding for handling SAMSON devices. The images shown in these instructions are for illustration purposes only. The actual product may vary.
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Page 3: Table Of Contents
Contents General safety instructions ................4 Process medium and scope of application ............5 Transportation and storage ................5 Design and principle of operation ..............6 Installation ....................9 Notes on installation ..................9 Strainers .....................10 Shut-off valve ....................10 Pressure gauge ....................10 Operation ....................12 Start-up .......................12 Pressure test ....................12 Steam applications ..................13 Adjusting the set point ..................13... -
Page 4: General Safety Instructions
General safety instructions 1 General safety instructions − The device must be mounted, started up or serviced by fully trained and qualified personnel only; the accepted industry codes and practices are to be observed. Make sure employees or third parties are not exposed to any danger. − All safety instructions and warnings given in these mounting and operating instructions, particularly those concerning installation, start-up, and mainte- nance, must be strictly observed. -
Page 5: Process Medium And Scope Of Application
Process medium and scope of application 2 Process medium and scope of 2.1 Transportation and storage application The device must be carefully handled, trans- ported and stored. Protect the regulator Pressure regulators for set points from 2 to against adverse influences, such as dirt, 28 bar · Valve sizes DN 65 to 400 · Pressure moisture or temperature outside the ambient rating PN 16 to 40 · Suitable for liquids, temperature range. -
Page 6: Design And Principle Of Operation
(3.1) are cation. compared. The regulator version for steam is only avail- In the Type 2335 Excess Pressure Valve, the able with valves balanced by a bellows. This rising upstream pressure p causes the main version has a compensation chamber (10) valve to open. - Page 7 Design and principle of operation Type 2335 Excess Pressure Valve · Type 2422 Valve balanced by a bellows · DN 125 to 250 Type 2422 as main valve balanced by a bellows Version suitable for vapors Pilot valve Bottom section with bellows Pilot valve Bottom section with bellows Version suitable for liquids and gases Globe valve (main valve) Strainer Seat...
- Page 8 Design and principle of operation Type 2335 Excess Pressure Valve · Type 2422 Valve, balanced by a diaphragm · DN 125 to 400 Pilot valve Diaphragm section Type 2422 as main valve, balanced by a diaphragm Valve body (main valve) Control pressure Seat Upstream pressure Plug with plug stem Downstream pressure 3.1 Set point spring Pilot valve 5.1 Control line for pilot valve...
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Page 9: Installation
Mounting orientation pecially in applications with gases, air or Observe the flow direction. steam. Valve balanced by a bellows Contact SAMSON to obtain the − Bellows including housing TV-SK 17041 documentation which contains suspended downward. more details on installation requirements. Valve balanced by a diaphragm 4.1 Notes on installation − Balancing diaphragm (diaphragm sec-... -
Page 10: Strainers
80 °C. in the pipeline and install a bypass. 4.2 Strainers Pipeline routing The inlet and outlet lengths vary depending Install a strainer (e.g. SAMSON Type 1/ on several variables and process conditions Type 2) upstream of the excess pressure and are intended as recommendations. Con- valve. tact SAMSON if the lengths are significantly − The direction of flow must correspond to... - Page 11 Shut-off valve Upstream pressure gauge Strainer Type 2422 as the main valve Downstream pressure gauge Type 2335 Excess Pressure Valve Shut-off valve Fig. 3: Installation example for Type 2335 Excess Pressure Valve Table 2: Inlet and outlet lengths min. min. a x DN b x DN Inlet length Outlet length...
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Page 12: Operation
See Fig. 1 and Fig. 2. Note 5.1 Start-up The plant operator is responsible for performing the pressure test. SAMSON's Do not start up the regulator until all parts After-sales Service can support you to plan have been mounted (e.g. valve and control and perform a pressure test for your plant. -
Page 13: Steam Applications
Operation 5.3 Steam applications The pressure gauge located on the upstream pressure side allows the adjusted set point to Observe the following points for applications be monitored. with steam: First set the maximum set point by turning − Before start-up, all pipes conveying the the set point adjuster clockwise (P). -
Page 14: Maintenance
Depending on the operating conditions, analysis may often require the on-site assis- check the regulator at regular intervals to tance of SAMSON's After-sales Service. avoid possible malfunctions. The table is not intended to be exhaustive as there are diverse reasons for malfunctions. - Page 15 Maintenance Table 3: Troubleshooting Malfunction Possible reasons Recommended action Note Malfunction only occurs when the consumer is closed or during low load: Remove valve from the pipe- Install a shut-off valve instead line and clean seat and plug. of the pilot valve. If the main Pilot valve · Leakage Renew plug, if necessary.
- Page 16 Maintenance Troubleshooting (continued) Malfunction Possible reasons Recommended action Note Strainer in the line in which the pilot valve is installed is Clean the strainer. clogged up. The required minimum dif- ferential pressure to operate Raise upstream pressure or the regulator is not avail- reduce downstream pressure.
- Page 17 If this is the case, send a sketch of plant at the location where control process especially in the plant to SAMSON for a thor- the regulator is installed are applications with gases, air ough analysis.
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Page 18: Nameplate
Material number Perm. temperature in °F Order number or date 10 Body material coefficient 11 C coefficient (K x 1.17) Valve size 12 Class (pressure rating) Pressure rating Perm. differential pressure in bar Perm. temperature in °C Body material Fig. 4: Nameplate of Type 2335 Excess Pressure Valve EB 2552-2 EN... -
Page 19: Technical Data
Technical data 8 Technical data Table 4: Technical data · All pressures in bar (gauge) Type 2422 Valve Balanced by a bellows Suitable for liquids, gases or vapors · · Valve size DN 65 DN 80 DN 100 DN 125 DN 150 DN 200 DN 250 Pressure rating PN 16 to 40 ·... - Page 20 Technical data Type 2422 Valve · Balanced by a diaphragm· Suitable for liquids and gases Valve size DN 125 DN 150 DN 200 DN 250 DN 300 DN 400 4) Pressure rating PN 16 to 40 · Conformity coefficient 1250 2000 1) 1) value 0.35 1) Minimum differential pressure Δp 0.8 bar 0.4 bar 0.5 bar 0.3 bar 1) Max. permissible differential pressure 12 bar 10 bar 6 bar ∆p...
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Page 21: Dimensions
Dimensions 9 Dimensions Type 2422 Valve · Balanced by a bellows, with pilot valve · DN 125 Type 2422 Valve · Balanced by a bellows, to 250 with diaphragm actuator · DN 65 to 250 Ø D Valve balanced by a bellows, DN 125 DN 150 DN 200 DN 250 with pilot valve Length L Height H Height H1 Height H2 Max. - Page 22 Dimensions Type 2422 Valve · Balanced by a diaphragm, with pilot valve · DN 125 to 400 Valve balanced by a DN 125 DN 150 DN 200 DN 250 DN 300 DN 400 diaphragm, with pilot valve Length L 1100 Height H1 Height H2 Weight , approx. (PN 16, with 50 kg 70 kg 210 kg 305 kg 315 kg 625 kg Type 44-1 B Pilot Valve) +10 % for cast steel 1.0619 (PN 25) and spheroidal graphite iron EN-GJS-400-18-LT (PN 25)
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Page 23: After-Sales Service
After-sales service 10 After-sales service If malfunctions or defects occur, contact the SAMSON's After-sales Service for support. The addresses of SAMSON AG, its subsidiaries, representatives and service facilities world- wide can be found on the SAMSON website (u www.samsongroup.com), in all SAMSON product catalogs or on the back of these Mounting and Operating Instructions. - Page 24 EB 2552-2 EN SAMSON AKTIENGESELLSCHAFT Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 samson@samsongroup.com · www.samsongroup.com...
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