Page 19 of catalogue Butterfly valves of Erhard GmbH & Co. KG

Special types for a wide range of uses

The standard range of ERHARD Butterfly valves by nominal sizes and pressure ratings DN PN 10 PN 16 PN 25 PN 40 ERHARD ROCO 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 ERHARD ROCO Premium ERHARD EAK butterfly valve >=1000

Apart from the extensive standard range of products (table above), ERHARD also supplies numerous special designs for a wide range of uses. Here are a few examples: Design with BLS The new restrained BLS® slip-type coupler connection (BLS = Buderus Lock System) is the result of further development of tried and tested thrust protection systems. It is keyed and can withstand high loads and stresses, i.e. it can also be used for extreme application cases, and it is easy to install and dismantle. Due to the numerous advantages of this flangeless connection, apart from other Valves, ERHARD has developed ERHARD ROCO butterfly valves in nominal sizes 250 and 300 (PN 16) for this forward-looking system. Design with Welding ends Another example of solutions tailor-made to customers' specific requirements are ERHARD ROCO butterfly valves with welded ends. They are specially produced for use in gas supply networks with pressure ratings up to PN 16. In this special case, the external corrosion protection consists of a high-quality twocomponent polyurethane coating for valves laid in the ground. This coating is ideally suited for reliable corrosion protection connection after carrying out welding work in pipe trenches. The design and engineering of this valve is the same as the ERHARD

ROCO Standard, the body is made of ST52-3. The pressure tests for gas are carried out according to DIN 3230 Part 5 in PG1 or P3. Long series design Apart from the standard design with face-to-face dimensions according to DIN EN 558-1 Basic line 14, ERHARD ROCO butterfly valves are also available with a long design according to basic line 15. The range of products available includes nominal sizes DN 400, DN 500 and DN 600 with pressure ratings PN 10 and PN 16; other designs are available on request. A design with and without bypass is available as a possible basic version. The main area in which this valve is used is for the pressuresurge free filling and draining of Pipes via the integrated bypass with a ERHARD butterfly valve. Timeconsuming assembly of a bypass pipe in pipe trenches is therefore no longer necessary. The whole system is “as if cast from one piece” and provides optimum corrosion protection. Further accessories The wide range of ERHARD butterfly valves also includes other accessories, e.g. A End position switch on gearbox A Lockable handwheels A Lifting devices For further information, please contact your ERHARD consultant.

The BLS system tried and tested in practice in combination with ERHARD valves, for example in rocky terrain, have proven to be ideally suited for many years.

ERHARD ROCO butterfly valves with welding ends are available in nominal sizes DN 200 to DN 600.

The bypass in ERHARD ROCO long series butterfly valves is equipped with an ERHARD gate valve.

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