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Products features and benefits
- Face-to-face length acc. to EN 558-1, basic series 15 - from DN 500 1.5 x DN
- With flange ends on both sides acc. to EN 1092-2
- Control valve in straightway type
- With customized control device depending on operating conditions
- Low actuating torque due to pressure balanced valve piston
- Rotationally symmetrical flow guidance
- Annular flow cross section in each position
- Axial movement of the plunger by means of crank gear mechanism
- With self-locking worm gear unit including position indicator
- Elastic profile sealing ring located in the no-flow zone for high durability
- Wear-resistant, corrosion-resistant and infiltration-proof piston guides in the body by micro-finished bronze weld overlay
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Materials
- Body: Ductile cast iron EN-JS 1030 (GGG-40)
- Piston guide rails: Bronze overlay welded
- Piston: Stainless steel 1.4301 Operation data
- Valve sealing: EPDM
- Inner parts: Stainless steel (exception: > DN 600 crank gear from EN-JS 1030 (GGG-40))
- Bolts: Stainless steel A4 (DIN EN ISO 3506)
- Bearing bush: Bronze
- Eye bolts for lifting: Galvanized steel 1.0401 (C15)
Corrosion protection
- Inside and outside epoxy coating
Product versions:
- With electric actuator
- With handwheel
- Own-medium control:
Product features and benefits
- - Regulation is effected by own-medium controlled operation; the pressure difference of the medium generates the torque necessary for operation (the pressure difference must be at least 2 bar)
- - Independent of the inlet pressure / flow fluctuations the valve regulates a higher inlet pressure down to a constant, lower outlet pressure
- - Weight lever with double bearing, prevents the transmission of drop-weight forces to the valve bearing
- - Drop weights in modular design for customised adaptation to operating conditions
Material
- Actuator:
- - Cylinder: stainless steel, guides made of bronze
- - Drop weight, bracket, lever: SJ235
- - Bearing bolts, bolts: Stainless steel 1.4021
- - Lever bearing: 1.4305 and/or bronze and PTFE
- Control circuit:
- - All working parts: Stainless steel 1.4404
- - Pipes: stainless steel 1.4571
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