Brand: Masoneilan

Masoneilan 35002 Series Camflex™ Rotary Control Valve

Name: Masoneilan 35002 Series Camflex Rotary Control Valve
Brand: Masoneilan

Description

The Masoneilan 35002 Series Camflex Rotary Control Valve is a high-performance rotary plug valve designed for precise flow control in demanding industrial applications. This innovative valve features an eccentric rotary plug that ensures excellent throttling capability, reduced wear, and extended service life. Available in sizes from 1″ to 16″ (25 to 400 mm), the Masoneilan 35002 Series Camflex Rotary Control Valve can be configured for flanged (ANSI 150–600), flangeless (ANSI 150–600, UNI-DIN 10–100), or screwed NPT connections (1″ to 2″), providing flexibility to meet diverse installation needs.

Constructed from high-quality materials, including carbon steel, stainless steel, and high nickel alloys, the Masoneilan 35002 Series Camflex Rotary Control Valve delivers durability and corrosion resistance even in the harshest environments. Its actuator options include the Model 35 spring diaphragm and the Model 70 Series cylinder, enabling dependable and accurate valve positioning. With a linear inherent characteristic, this valve is optimized for control precision, making it a reliable choice for both low and high-pressure applications.

This rotary control valve is widely used across industries such as power generation, refining, petrochemicals, and oil & gas. Key applications include condensers, cooling towers, reactor buildings, turbine buildings, balance-of-plant systems, distillation units, hydroprocessing, reforming, cracking, blending, quenching, fractioning, charge gas compression, separation, pipeline integrity management, dehydration, refrigeration, liquefaction, loading and shipping, and regasification processes.

The Masoneilan 35002 Series Camflex Rotary Control Valve is engineered for superior performance in critical service conditions. Its eccentric plug design minimizes friction, reducing actuator torque requirements and improving operating efficiency. This design also contributes to a tight shutoff capability, minimizing leakage and ensuring process safety.

By choosing the Masoneilan 35002 Series Camflex Rotary Control Valve, operators benefit from a proven control solution with over 50 years of industry presence. Its modular design allows for easier maintenance, lower lifecycle costs, and adaptability to changing process requirements. Whether installed in a refinery’s hydroprocessing unit, a power plant’s steam cycle, or a petrochemical separation process, this valve delivers reliable performance and precise control under challenging conditions.

If you need a robust, efficient, and versatile control valve for your industrial process, the Masoneilan 35002 Series Camflex Rotary Control Valve offers the performance and dependability you can trust.

Technical Specifications

Parameter	Value
Manufacturer	Masoneilan (Baker Hughes)
Model	35002 Series Camflex II
Product Type	Eccentric-plug rotary control valve
Sizes	1 in. through 16 in. (DN 25–400)
Pressure Ratings	Flangeless ASME Class 600 standard; flanged Class 150, 300 or 600 depending on size
Temperature Range	Metal-seated: −196°C to +400°C (−320°F to +750°F); soft-seated: −196°C to +232°C (−320°F to +450°F)
Flow Characteristic	Inherently linear
Rangeability	Standard trim greater than 100:1; DVD option greater than 50:1; low-flow trim 15:1
Body Materials	Carbon steel, 316/316L stainless steel, Hastelloy C (1–4 in.), chrome-moly
Plug / Seat	Solid Stellite No. 6 (1–4 in.) or 316L stainless steel with hardfaced seating (3–16 in.); optional PTFE/PCTFE soft-seat inserts
Actuator Options	Model 35 spring diaphragm, Model 70 Series cylinder

Technical Overview

The Masoneilan (Baker Hughes) 35002 Series, marketed by the manufacturer as the Camflex II, is an eccentric-plug rotary control valve designed for demanding throttling service across a wide range of process industries. Per Baker Hughes’ official technical specification (BHMN-35002-TS-19376E), the Camflex II is available in sizes from 1 in. through 16 in. (DN 25–400), with flangeless bodies rated to ASME Class 600 as standard, and flanged versions available in Class 150, 300, or 600 depending on size; a Globe Replacement (GR) variant covers 1 in. through 6 in. in Class 150/300/600 (or PN 10/16–25/40 to EN 558).

Temperature capability depends on seat selection: metal-seated trim is rated from −320°F to +750°F (−196°C to +400°C), while soft-seated trim is rated from −320°F to +450°F (−196°C to +232°C). The valve’s eccentric rotary plug design provides an inherently linear flow characteristic as standard, with high-rangeability trim options available for specialized applications. Standard trim delivers rangeability greater than 100:1, a Differential Velocity Device (DVD) option provides greater than 50:1, and a dedicated low-flow trim provides 15:1 — giving specifying engineers considerable flexibility to match the valve to a wide span of flow conditions without oversizing. Typical Cv values scale from roughly 0.4–2.8 on the smallest 1 in. size up to 94–3,650 on the largest 16 in. size, with a high-capacity 70-degree-rotation version extending Cv even further (up to roughly 5,250–5,980 on 16 in.).

Body materials include carbon steel, 316/316L stainless steel, Hastelloy C (1–4 in.), and chrome-moly options for higher-temperature or more corrosive service, while the plug/seat is available in solid Stellite No. 6 (1–4 in.) or 316L stainless steel with hardfaced seating (3–16 in.), with optional PTFE/PCTFE soft-seat inserts for tight shutoff applications. Specialized configurations are available for geothermal, slurry, and cryogenic service, reflecting the valve family’s reputation for tight shutoff and long service life across a broad range of process conditions.

Applications

The Camflex II is widely used across oil and gas, petrochemical, power generation, and general process industries for throttling control on liquid, gas, and slurry services where tight shutoff, a compact rotary footprint, and a wide flow-turndown range are required. Its rotary eccentric-plug design also makes it well suited to applications with entrained solids or erosive service, where a traditional sliding-stem globe valve trim would wear prematurely.

Why Seven Star LLC

Seven Star LLC supplies genuine Masoneilan/Baker Hughes Camflex II valves to customers across Oman and the GCC, and works with process and instrumentation engineers to confirm the correct size, pressure class, trim material, and Cv selection for a specific control application before ordering.

Request a Quote for Masoneilan 35002 Series Camflex™ Rotary Control Valve

Contact Seven Star LLC to request a quotation for the Masoneilan Camflex II (35002 Series) rotary control valve. Our engineering team can help confirm the correct size, materials, and trim configuration for your process application, and support reliable delivery across Oman and the wider GCC region.

Ordering Notes

When requesting a quotation, please specify valve size, required pressure class, process fluid and temperature, and whether tight shutoff (soft seat) or high-temperature (metal seat) trim is needed, so Seven Star LLC can confirm the correct Camflex II configuration and Cv selection for your application before shipment.

Field Service Support

Seven Star LLC also supports customers with spare trim kits, seat rings, and packing sets for Camflex II valves already installed across Oman and the GCC, helping plants keep critical rotary control valves in service without waiting on lengthy factory lead times for a full replacement valve body during scheduled turnarounds.

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About brand

Masoneilan is a control valve brand of Baker Hughes with roots going back to 1882. Its Camflex eccentric plug rotary valve, 21000 series globe valve and SVI digital positioners are fixtures in refineries, gas plants and power stations. Every valve carries a serial number and a long model number that define the actuator, body and trim.

Seven Star LLC is an independent supplier listing Masoneilan control valves, actuators, regulators, positioners and level instruments for buyers in Oman and the GCC. We source complete valves as well as Masoneilan spare parts against that nameplate data.

Masoneilan at a glance

Origin	Mason Regulator Company, Boston area, USA (1882). It acquired the Neilan Company of California in 1931, and the two names became Masoneilan.
Ownership	Dresser Industries from 1985, then GE Oil & Gas, now Baker Hughes
Milestones the company cites	Cv flow coefficient introduced (1944), spring-diaphragm actuators (1955), Camflex rotary globe valve (1968), Lo-dB low-noise trim (1975), LincolnLog axial-flow letdown valve (1982), Varipak (1984), V-Log (1998), SteamForm steam conditioning valve (2002)
Product families	Globe, rotary, butterfly and severe-service control valves, actuators, digital positioners, self-operated regulators and displacer level instruments
Typical duty	Throttling control of steam, gas, hydrocarbons and water, high-pressure letdown, anti-cavitation and low-noise service

Masoneilan control valves and actuator series

Series	Type	Typical use
21000, 21009	Top-guided and cage-guided globe valves	General process control. Cryogenic (21000 C), bellows seal (21000 BS) and API 6A versions are also made
41005	Cage-guided globe valve	Higher pressure drop and larger sizes, up to 30-36 inch extended sizes; VRT anti-cavitation and API 6A versions
35002 Camflex II	Eccentric plug rotary control valve	Erosive, flashing and dirty service; HC high capacity, DVD low noise and GR globe replacement versions
37002 MiniTork II, 39003/39005, 33000	Butterfly control valves, high-performance and triple-offset	Large flows at low pressure drop, and tight-shutoff duty
28000 Varipak	Microflow control valve	Very small flows, with adjustable Cv
78400/18400 LincolnLog, 77000, 49000 V-Log	Severe-service multi-stage valves	High-pressure liquid letdown, anti-cavitation and gas noise reduction
84000/84003 SteamForm, DSH	Steam conditioning valves and desuperheaters	Turbine bypass and steam pressure and temperature reduction
87/88, 37/38, 51/52/53	Spring-diaphragm and piston actuators	Linear and rotary valve actuation; diaphragms and soft-goods kits are listed separately
SVI3, SVI II AP, SVi1000, SVI FF	Digital valve positioners	HART or FOUNDATION Fieldbus positioning with valve diagnostics; the SVI II ESD adds partial stroke testing
4700/4800, 8013	Pneumatic and electro-pneumatic positioners	Older installed base. Many sites move to SVI positioners at overhaul
525/526, 535/536, 171-174	Self-operated pressure regulators	Pressure reducing and back-pressure control without external power
12400, 12800	Displacer level transmitters and controllers	Digital (12400, HART, SIL 2 version 12420) and pneumatic (12800) level control on separators and vessels

Where Masoneilan valves are used

Throttling duty on steam, hydrocarbons, gas and water is the daily work of these valves. Typical services are feedwater and steam conditioning in power plants, separator and compressor loops in gas processing, high-pressure-drop letdown, cryogenic service in LNG and air separation, and general flow, pressure and level control in refineries and chemical plants.

Ordering Masoneilan valves and spare parts: what we need

For spare parts the serial number decides the order, because the factory record behind it lists the trim, materials and actuator. Send a clear nameplate photo with the serial number, model number, size and pressure class. For a new valve, add the process data: fluid, inlet and outlet pressure, temperature, minimum, normal and maximum flow, required leakage class, fail position, air supply and control signal. When an older positioner or valve series is no longer made, we quote the successor that Baker Hughes names and list the mounting kit it needs.

Facts checked against Baker Hughes Masoneilan product information and the company's published timeline, October 2026.

Browse Masoneilan products by category: Control Valves, Valve Actuator, Regulators, Valve Positioner, Level Transmitter.

FAQ

Questions about the Masoneilan 35002 Series Camflex™ Rotary Control

Answers from our engineering team on installation, compatibility and integration.

01What distinguishes the Camflex design from a standard globe control valve?

The 35002 Series uses an eccentric rotary plug rather than a linear-stroke globe plug, which minimizes friction between plug and seat, reduces actuator torque requirements, and delivers tight shutoff with less wear over time.

02What size range and end connections are available?

It's offered from 1" to 16" (25-400mm) with flanged (ANSI 150-600), flangeless (ANSI 150-600 or UNI-DIN 10-100), or screwed NPT (1"-2") connections.

03What actuator options pair with the Camflex valve?

It can be fitted with a Masoneilan Model 35 spring-diaphragm actuator or a Model 70 Series cylinder actuator, both providing dependable, accurate rotary positioning.

04What materials are available for corrosive or high-temperature service?

Body materials include carbon steel, stainless steel, and high-nickel alloys, allowing the valve to be specified for corrosive or high-temperature process streams beyond standard carbon-steel service.

05In what processes is the Camflex typically applied?

It's used across power generation, refining, petrochemical, and oil and gas processes, including distillation, hydroprocessing, gas compression, LNG liquefaction and regasification, and pipeline systems, anywhere tight-shutoff rotary control is needed.