RS ECCENTRIC BUTTERFLY VALVE SERIES

RS ECCENTRIC BUTTERFLY VALVE SERIES

The RS Eccentric Butterfly Valve has similarities to the DS Concentric Butterfly Valve, with the difference of a simple eccentric disc design and the same advantages in terms of performance, easy maintenance and diversity of materials.

Catalog

description

> Construction Standard

API 609 Category A.

> Face to face

API 609 Category A

ISO 5752 Col. 20

MSS SP-67

> Dimensions

26″ to 54″.

> Pressure Limit

50 to 250 psi / 10 bar.

> End of Line Application

75 psi (Fixed on seat side only)

150 psi (Fixed between the two flanges)

> Body Connection

Constructed in one piece in Wafer, Flanged and Lug configurations, The RS Eccentric Butterfly Valves have the option of an extended neck body for greater pipe clearance and isolation. The Wafer model has four semi-lugs that facilitate installation and center the valve on the pipe flanges.

> Eccentric Disc

Configured to provide low pressure drop in the fully open position. The sealing area is polished around the entire perimeter, ensuring full seal with the seat and low drive torque.

> Stem

The upper rod transmits rotation to the disc through locking torque plugs. The lower rod is coupled to a device for centering the disc in relation to the body, fixed to the disc by a locking torque plug, featuring the “Trunnion” system of the set – ensuring perfect alignment of the body, disc and seat.

> Interchangeable seat

With a vulcanized elastomer seat in a rigid ring, the RS valve seat is fixed on the side of the body, preventing deformations and reducing the actuation touch.

The RS series has two sealing levels:

Level 1:  Sealing on the installation flange on the side, where the seat is located, requiring the use of gaskets between the body and the flange opposite to the seat.

Level 2:  Sealing through seat and disc contact.

**On the opposite side of the seat, it is necessary to use gaskets**

> Bearing

The RS Series bronze bearing eliminates friction between the rod and the body, providing reduced torque.

> Gasket

Packing systems actuated through the packing gland that performs the protective seal on the upper rod.