Multi-Z

Multi-Z

Multi-Z valves are used if solids are entrained in the medium and if there is a possibility of cavitation forming. In addition this multiple stage valve is capable of reducing high-pressure differentials via a multiple stage relief process. Flowserve reduces pressure via division in partitions, a course which is different to that pursued by other suppliers. The major advantage is a noticeable reduction in wear combined with an extremely low-noise control valve. Likewise deviating from conventional procedures, in order to avoid cavitation a physically optimized technology has been implemented that achieves significantly better results.

Brand: Valtek
Category: Cavitation Control & Elimination
Function Cavitation Elimination
Pressure Stages 3 to 6+
Cv Range 0.03 to 137
Trim Design Axial Notched Plug & Seat Sleeve
Solids Capable Yes
Materials Alloy & Ceramics
Valve Size 1" to 10"
Pressure Class Standard ASME B16.34
Pressure Class Range Class 300, 600, 900, 1500, 2500
Body Globe, Angle
End Connections Integral Flange, Screwed (NPT), Socket Weld, Butt Weld, Custom
Face-to-Face Standard ANSI ISA S75.08.01, S75.08.06 (Globe); Manufacturer Standard (Angle)
Bonnet Bolted with Extension as required by Pressure-Stages
Packing Standard, Twin Seal, Vacuum Seal, Fugitive Emissions, Live-Loaded, Bellows
Guiding Plug to Seating Sleeve along Pressure-Stages
Trim Axial Notched Plug
Trim Characteristics Equal Percentage, Linear
Seating Metal-to-Metal & Soft
Shut-Off Classification ANSI FCI 70-2 Class IV, V, VI

Multi-Z is specifically designed to handle high-pressure drops where entrained solids are a problem, and is tested and certified for pump compatibility

Ideal for applications in chemical, petrochemical and power with pressure differentials of up to 5880 psi (400 bar), such as system start-up and boiler feed-water recirculation

The addition of a unique venturi outlet nozzle provides further trim and seat protection from high velocity, cavitation and flashing

Multi-Z linear multistage plug design provides high rangeability and throttling resolution, and dramatically reduces noise

Trim designs are available as unbalanced or pressure-balanced, with the number of stages optimised for specific service conditions

Multi-Z body is available in angle configurations, and in a choice of carbon steel, stainless steel, nickel-based alloy, and CrMo steel

Certifications Canadian Registration Number (CRN)
Design Standards ASME B16.5 – Pipe Flanges & Flanged Fittings
ASME B16.34 – Valve Flanged, Threaded, and Welding End
ASME SA Materials
ASTM A Materials
Quality IS0 9001:2008
ATEX QAN
IECEX QAR