NAF Setball (v-port)

The NAF Setball (v-port) is a ball sector valve with metal-to-metal or metal-to-PTFE seating. The NAF Setball (v-port) combines the best control characteristics of a ball valve and butterfly valve. It can be used both as a control valve and as a shutoff valve. It is available as standard in stainless steel. It is also available in other materials, such as CG8M, Titanium, etc. Contact NAF for more information
The valve has:

• a one-piece, leak-proof stainless steel body, with face-to-face lengths in acc. with IEC standards
• a ball sector with top and bottom bearings for low operating torque, so that low-torque actuators can be used
• a V-shaped sector that provides accurate control over a wide range, even at low flow rates and if used for viscous media with high concentrations of solid particles
• a spherical area of the ball sector which, with PTFE-seat gives tight closing. The Stellite seat ring ensures excellent tightness at all differential pressures. The maximum leakage in the direction of flow is less than 5 x 10-6 of the Kv value in this case.
• PTFE lined bearings.
• O-ring or graphite packing for the stem gland
• The standard Stellite seat can easily be converted to PTFE after turning the ball sector by 180 degrees, without the need to dismantle the valve.
• NAF standard for mounting the actuator, which simplifies installation and results in a compact valve/actuator unit

CE-marked according to Pressure Equipment Directive (PED 97/23/EG) module H, category III. For module H1, category IV contact NAF

NAF-Setball can be used both as a control valve and as a shut-off valve, in a wide variety of applications and in different operating modes.The valve represents a concrete result of our product philosophy which is focused on functionality, high quality and low life-cycle costs and is based on concentrating our range to a limited number of valve types, but all of them suitable for a wide variety of applications.

Industries:
Paper Stock, Coatings, Digester, Chemical and Liquor, Bleach Chemicals

V-port ball sector valve with excellent control valve characteristics.

Flowserve NAF-Setball can be used in a wide variety of applications and meets the highest demands for control accuracy. Splined connection between shaft and sector minimizes backlash.

Equipped with NAF’s unique maintenance-free o-ring stem seal design. Flowserve NAF Setball is an integrated part of the NAF control valve package with a unique direct mounting concept. Lots of versions available, such as a solution for high-density black liquor and for chlorine bleaching.

Technical

• DN 25-400 (1-16
• PN 10-40 (ANSI Class 150, 300)