Masoneilan 77000 Series Multi-Stage High Pressure Valve
The 77000 Series multi-stage expanding area control valve is designed primarily for high pressure compressible fluid or two-phase applications. It effectively controls erosion, vibration and high noise conditions, making it an ideal solution for high pressure, high temperature, flashing hydrocarbon liquid services. Typical applications for this design include a range from Hot High Pressure Separator control in Hydroprocessing applications to gas wellhead control in off-shore choke valves as well as a reliable solution for high pressure gas letdown with entrained debris.
Features
1.Multi‑stage expanding‑area axial flow trim for gradual pressure reduction across stages
2.Effective control in high‑pressure gas, flashing liquid, and two‑phase flow conditions
3.Reduced fluid velocity to lower erosion, vibration, cavitation, and noise levels
4.Heavy guiding system for stable alignment and consistent control performance
5.Short stroke design to support extended packing service life
6.Available in angle valve configuration with top or bottom bonnet arrangements
7.Interchangeable trim options to match varying process conditions
8.Hardened seat and guiding surfaces for improved wear resistance
9.Compatible with high‑thrust diaphragm and cylinder actuators
10.Suitable for high‑pressure class ratings up to ANSI 2500
11.Compliant with NACE standards for sour service applications
12.Linear flow characteristic for stable and predictable process control
13.Expanding outlet passages to accommodate compressible flow expansion
14.Top‑entry trim for simplified in‑line service and maintenance
Specifications
Size
2” x 3” through 8” x 10” (50 x 80 through 200 x 250 mm)
Ratings & Connections
flanged: inlet ANSI 900-2500, outlet ANSI 900 – 2500, UNI-DIN 150 - 400; welded: BW or SW
Body Materials
carbon steel; stainless steel; chrome-moly
Actuators
model 37/38 spring-opposed diaphragm; cylinder
Trim
axial flow technology; multi-stage trim (expanding area type); anti-cavitation, flashing, de-gassing, and low noise
Inherent Characteristics
linear
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