B/240 Pressure Regulators - Bulletin
8Pages

PRESSURE REGULATORS Process Management

2 B/240 series The regulators of the B/240 series due to their operating specifications are mainly used in those system where sudden capacity variations are required, or else, where the cut-off of the gas distribution is controlled by solenoid valve, such as for the feeding of burners. They can be used with natural gas, manufactured gas, air, propane and other gases, as long as they do not contain a high percentage of benzole. The B/240 series regulators are springcontrolled single seated, whit counterbalanced valve disc. They are usually supplied with safety valve and builtin filter and...

3 Operation The movements of the diaphragm (D) are transmitted to the valve disc (O) by the stem (S) and the lever (L). The downstream pressure through the pulse pipe (I) exerts a force under diaphragm (D) and this force is counteracted by the adjusting spring (M). The gas pressure on the diaphragm tends to close the valve disc; the antagonist action of the adjustment spring tends to open it. Under normal conditions the balance between these antagonist actions positions the valve disc in such a way as to ensure a constant pressure and therefore the downstream capacity. Upon any capacity...

4 Shut-off device operation The B/240 series pressure regulators can be fitted with an OS/66 slam-shut valve. This safety device operates independently of the regulator and, according to customer request, can be made to trigger by any pressure variation, whether above or below set point, or by both. How the shut-off device works Outlet pressure acting upon diaphragm (D) is counteracted by maximum pressure spring (M2), thus overcoming the action of the minimum pressure valve (M3). Under such conditions, the moving part (E) of the valve is held in balance so that lever (L) is aligned with the...

Technical Body allowable pressure PS: 20 bar specifications Highest operating pressure Pmax : 300 mbar Permissible inlet pressure Pe max : 6 bar Inlet pressure range £>pe : 0.1 to 6 bar Lock-up pressure class SG : up to+10% Maximum flow rate Qmax : UP to 3°0 Stm3/h Built-in slam Independent pneumatic control shut valve Accuracy class AC : +5% connections Inlet and outlet 1V2" BSP connections B/...-FS version DN 40 • PN 16 UNI/DIN Temperature Standard version: Low-temperature version: Built-in filter Without relief valve Non-corrosive gases Materials Actuator casing Die-cast aluminium Valve...

Configurations The following pilots are used with B/240 series regulator with built-in shut-off device: • OS/66 Series spring loaded pilot Body Aluminium Cover Steel

Flow rates table Stm3/h Following flow table (referred to Natural Gas) is advised for an optimal use of the B/240 series regulators. For other gases with different densities, the flow rate must be multiplied by the correction factor:

Overall dimensions mm B/249 • B/249-AP Ø 200 B/242 • B/242-AP Ø 200 175 50 50 170 175 Ø 125 153 252 153 90 50 252 184 184 48 48 130 130 75 75 170 FS ver sion FS ver sion Natural Gas Technologies Natural Gas Technologies Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Regulator Technologies, Inc. O.M.T. Officina Meccanica Tartarini s.r.l. Via P. Fabbri, 1 I - 40013 Castel Maggiore (Bologna), Italy Tel. : +39 - 0514190611 Fax: +39 - 0514190715 E-mail: info.tartarini@emerson.com Francel S.A. Z.A. La Croix Saint Mathieu 28320 Gallardon France Tel: +33 (0)2 37...