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Excess Pressure Valve Type 2408

Excess Pressure Valve Type 2408
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Self-operated Pressure Regulators Excess Pressure Valve Type 2408 Application Excess pressure valve for set points from 5 mbar to 1000 mbar · Valves with flanged body DN 15 and 25 as well as with female thread G ½, G ¾ and G 1 · Nominal pressure PN 25 · Suitable for gases at temperatures from –20 to +60 °C (0 to 150 °C) 1) This regulator is used to control the pressure of flammable gases used as a source of energy, e.g. in boilers, driers, vaporizers, heat exchangers or industrial ovens. Alternatively, it can control the compressed air supply in process engineering applications. An additional application of the regulator is the pressure control of inert gas used for inerting or blanketing reaction or storage tanks to protect the product in the tank from oxidation, explosion or escaping. To achieve an economical consumption of the inert gas, its pressure must be controlled to always remain slightly higher than atmospheric pressure while the tank is being filled or emptied. Special features • Low-maintenance proportional regulators • Compact regulator design providing excellent control accuracy • Internal set point springs with set point adjustment using a nut on the actuator • Spring-loaded, single-seated valve • Connection G ¼ for external control line • Fulfills stricter fugitive emission requirements (TA-Luft) • Minimum leakage class IV • Suitable for vacuum Versions Valves in G ½, G ¾ and G 1 or DN 15 and 25 · Soft-seated plug · Body made of stainless steel 1.4408 or spheroidal graphite iron EN-JS1049 Special versions • Version with FDA-compliant materials for food processing and pharmaceutical industries • Version to comply with NACE (sour gas) 1) Version with soft seal and diaphragm made of FPM for air and nitrogen Associated Information Sheet Fig. 1 · Type 2408 Excess Pressure Valve Edition Febr

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Principle of operation The medium flows through the valve as indicated by the arrow. The position of the valve plug and the area released between the plug (3) and seat (2) determine the flow rate. In the pressureless state (control line not connected and no pressure applied) the valve is closed by the force of the set point springs (7). The upstream pressure p-| to be controlled is tapped upstream of the valve and transmitted over the external control line to the actuator (6) where it is converted into a positioning force. This force is used to move the valve plug according to the force of...

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Table 1 • Technical data

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Type 2408 ■ Stainless steel body with screwed ends Type 2408 ■ Flanged body made of spheroidal graphite iron Table 3 • Dimensions in mm and weights in kg Fig. 4 • Dimensional drawings of Type 2408 Ordering text Excess Pressure Valve Type 2408 Nominal size DN ..., thread size G ..., Set point range ... mbar, Kys coefficient ... Body material ... Material: Plug sealing ..., operating diaphragm ... Specifications subject to change without notice SAMSON AG ■ MESS- UND REGELTECHNIK WeismullerstraBe 3 ■ 60314 Frankfurt am Main • Germany Phone: +49 69 4009-0 ■ Fax: +49 69 4009-1507 Internet:...

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Excess Pressure Valve Type 2408 4Pages

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Excess Pressure Valve Type 2408
4Pages