Safety shut-off valve - S 50
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Safety Shut-Off Valve S 50 Product information © 01.2023

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Table of Contents Application, Characteristics, Technical Data 4 Application 4 Characteristics 4 Type of models / Options (see page 10) 4 Technical data 5 Structure and function 6 Sectional view 7 SSV setpoint spring table - control device 8 Dimensions, Connection, and Weight 9 Dimensional drawing 9 Dimensions and weight 9 Connection of the measuring lines and breather lines 9 Types of Models / Options 10 Design 11 Properties of Gases 11 Order Data 12 Notes 13 Contact 14 Notes 16 Observe the following publications in relation to ATTENTION installation, start-up and maintenance: DVGW - work...

Application, Characteristics, Technical Data Application Safety shut-off valve (SSV), direct-acting (operating without auxiliary power), for systems acc. to DVGW work sheets G 491 (A) and G 600 (A) (TRGI) Can be used for the gases defined in DVGW work sheet G 260 / G 262 and neutral non-aggressive gases. (other gases on request) Characteristics • Integral pressure-tight version (IS) • High flow rate capacity • Open-air model Type of models / Options (see page 10) • • • • • • with BV breather valve with electric position indicator SSV 'Closed' via inductive proximity initiator or via reed...

Technical data Type Nominal width Rp 1“ (DN 25), Rp 1½“ (DN 40), Rp 2“ (DN 50) (NPT thread on request) Standard volumetric flow rate Qn,max Material Housing / actuator housing/ Control device housing DIN EN ISO 12944-2 without additional coatings an epoxy resin coating is recommended (see page10) Temperature range, Class 2 (operating/ambient temperature) Function, strength and tightness DIN EN 14382 CE mark acc. to PED/ PIN number CE-0085-BS0420 Ex protection The mechanical parts of the device do not have any potential ignition sources of their own and therefore do not fall within the scope...

Structure and function The safety shut-off valve S 50 shuts off the gas flow when the outlet pressure in the regulation section exceeds or falls below a certain response pressure. To this end, the outlet pressure to be monitored is passed on to the SSV control device via a separate measurement line. As a function of the change in pressure, the diaphragm in the control device is raised or lowered. When the outlet pressure in the regulation section falls below the lower switch-off point or exceeds the upper switch-off point, the switch socket connected to the SSV diaphragm will move to the...

Sectional view Actuator housing Valve seat Actuator Ball detent Re-engagement unit Diaphragm Setting screw for lower response pressure Setting screw for upper response pressure

SSV setpoint spring table - control device S50: Rp 1“-2“ MD** to Wds o 300 mbar Spring data Spring no. Lower response pressure Δpwu [mbar] Upper response pressure wdso [mbar] Lower response pressure Δpwu [mbar] Δpwo [mbar] wdso [mbar] Upper response pressure *) Standard spring **) If the control device is set up for simultaneous monitoring of upper and lower response pressures, the difference between the setpoints for the upper and lower response pressures (pdso and pdsu) should be at least 10% greater than the total of values given for Δpwo and Δpwu. © 01

Dimensions, Connection, and Weight Dimensional drawing Connection of the measuring lines and breather lines Dimensions and weight Nominal width Connection* for: tube 12 x 1.5 (thread G 1/4) Breather line Measurement line

Types of Models / Options BV breather valve The BV breather valve is used as for securing the installation room against inadmissible escape of gas from diaphragm comparator compartments of safety shut-off valves. In case of a defect, the impermissible escape of gas into the surrounding atmosphere is limited to a maximum of 30l/h (air). BV breather valve It also serves as a substitute for an expensive and complex installation of breather lines. (Option not available for hydrogen version H2) Reed contact / inductive transmitter Reed contacts and inductive transmitters are used to monitor the...

Design Checking the gas velocities Inlet and outlet nominal width of the pipeline according to the selected device: 25 mm Qn = 70m³/h pu / (pd) = 5 bar Note: The factor 380 refers to an operating gas temperature from approx. 15°C to 20°C. For other temperatures, the velocity must be corrected as follows: wcorr = w ∙ (tgas + 273.15) / 290 Recommended max. gas velocity at the inlet flange: 50 - 70 m/s Lower value for redirections upstream of the SSV Pressure loss formula Determining the upper response pressure Calculation pressure absolute (pu +1 bar)= pu,abs Outlet pressure Pd (mbar) Upper...

Order Data Safety shut-off S50/Rp1“/MD-R/left/BV/N/H/WAZ/So valve: Order code: S50 Rp1“ MD-R left Example: Order selection Type S50 DN - Nominal width SSV with control device MD with control device MD-R SSV functional class A B Direction of flow Right (from left to right) Left (from right to left) SSV valve accessories without SSV valve accessories Breather valve Electrical position indicator, SSV “Closed” without electrical position indicator with ... , via proximity switch with ... , via Reed contact SSV release without release with manual release with electromagnetic remote release, when...

Contact Management ALEXANDER CHRISTIANI Technical Inside Sales Department MINDAUGAS PECKAITIS Phone: Mail: Head of Sales & Marketing FRANZ FEICHTNER Inside Sales Department SEBASTIAN HUCKESTEIN Head of Inside Sales Department MANUEL SCHEPP Inside Sales Department STEFANIE MÜLLER If you want to know more about solutions from MEDENUS for the gas industry, please contact your local contact person or go to our internet site at www.medenus.de Trade representation worldwide medenus.de/de/kontakt.html Gas-Druckregeltechnik GmbH Im Langen Feld 3 D-57462 Olpe Phone: +49 (0)2761 82788-0 Fax: +49...

The Medenus plus 10 reasons for good business relations 1. Consultancy expertise and quality standards developed over decades 2. Broad and proven standard range of feedback controllers 3. Modern, fast and efficient production for series products and for individual orders 4. Customer-specific design of pressure regulators and vacuum regulators and special designs 5. Guaranteed deadline compliance with a delivery deadline guarantee 6. Fast response time in all matters 7. Sufficiently large parts storage for production and spare parts 8. Customer-specific theory & practice training courses 9....