NAF Trimsector (v-port)

The NAF Trimsector with Z-trim combines the benefits of an advanced control valve with the simplicity of a ball sector valve.The patent applied design is based the well-established NAF-Setball ball sector valve. The NAF Trimsector Z-trim uses this new approach to solving the problem of cavitation and high noise level.
The valve has

• A ball sector with trim splits the flow into many other flow paths and the pressure drop in 3 steps. This unique design offers substantial control benefits.
• A ball sector with top and bottom bearings, trunion design, require very low operating torques, this enables the use of lower torque actuators.
• A V-shaped sector that provides accurate control over a wide operating range, even at low flow rates.
• The NAF-standard for actuator mounting utilizes a “direct mounting method”. This method results in superior control and a compact valve/actuator assembly.

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

Design:
The design of NAF Trimsector with Z-trim makes it possible to use the valve for media with some solid media, i.e. wood pulp, without a risk to plug the valve.

Applications:
The NAF Trimsector with Z-trim is a control valve which is intended for operation in cases in which pressure conditions give rise to cavitation and noise. The valves operation is focused on functionality, high quality and low life-cycle costs, and is based on concentrating NAF’s range to a limited number of valve types, but all of them suitable for a wide variety of applications.

Industries:
Bleach Chemicals,Digester

V-port ball sector valve with noise and anti-cavitation trim.

Flowserve NAF Trimsector can be used in a wide variety of applications and meets the highest demands for control accuracy. The unique patented Z-trim design reduces noise and cavitation by taking the pressure drop in several steps. Flowserve NAF Trimsector can be used for medias with impurities or fibres and have a self cleaning effect.

Z-trim also provides a high Cv value and an optimum control solution. Splined connection between shaft and sector minimizes backlash. Equipped with NAF’s unique maintenance-free o-ring stem seal design. Flowserve NAF Trimsector is an integrated part in the NAF control valve package with a unique direct mounting concept.

Technical

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