NAF Trimball

The NAF Trimball represents an entirely new approach for addressing the problem of cavitation, erosion and high noise level in control valves. The patented designs, which is based on our well-established NAF-Duball ball valve, combines the benefits of an advanced control valve with the simplicity of a ball valve. The valve has

• a ball with many zigzag channels which offer major control benefits.
• Z-trim makes pressure drops in 5 steps
• an easy-to-service arrangement, due to the off-centre joint face of the body, which allows for easy replacement of the ball and seals, without the need for removing the stem and actuator.
• a floating ball, which means that no vibrations are transmitted to the stem and actuator, even at high differential pressures.

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

Applications:
The NAF-Trimball is a control valve which is specifically intended for exacting operating cases in which demanding media and difficult pressure conditions give rise to cavitation, noise and erosion. The NAF Trimball valve represents a concrete result of NAF’s product philosophy which is focused on functionality, high quality and low life-cycle costs and is based on concentrating on a range to a limited number of valve types, but all of them suitable for a wide variety of applications.

Industries:
Bleach Chemicals,Digester

A control valve for the most difficult applications where high pressure drops are present, causing cavitation, noise and erosion.

The patented design is based on the Flowserve NAF Duball valve. Flowserve NAF Trimball is available with two different noise and anti-cavitation trims. A-trim gives the highest noise reduction for clean medias. The ball has a large number of small zigzag channels to take the pressure drop in several steps. When the valve is opening the channels will be opened one by one and up to 45 degrees the flow is forced to pass the channels twice.

Z-trim reduces noise and cavitation by taking the pressure drop in several steps. The design allows it to be used with impurities or fibres and have a self-cleaning effect. Z-trim also provides a high Cv value and an optimum control solution.

Technical

• DN 50-450 (2
• PN 10-40 (ANSI Class 150, 300)