Brand: Masoneilan

Masoneilan 80000 Series 3-Way Control Valve

Description

The Masoneilan 80000 Series 3-Way Control Valve is available in sizes from 1 to 10 inches (25 to 250 mm) with flanged, threaded or welded connections.

Size
1” through 10” (25 through 250 mm)

Ratings & Connections

Flanged: ANSI 150 – 600, UNI-DIN 10 -100

Threaded: NPT 3/4” through 2” (20 through 50 mm)

Welded: BW or SW, ANSI 900 – 2500 on request

Body Materials

carbon steel; stainless steel; chrome-moly

Actuators

model 87/88 multi-spring diaphragm; model 37/38 spring diaphragm; cylinder

Trim

v-port plug

Inherent Characteristics

linear

Description

The 80000 Series is a heavy duty three-way control valve designed for either combining or diverting service. Standard features include:

Heavy Guiding

Construction of the Masoneilan 80000 Series includes top guiding in the plug, as well as guiding within the seat ring locations providing an extremely well supported and stable design.

High Capacity

Large flow galleries in the 80000 Series provide high capacity designs with low pressure recoveries. High critical flow factors are attained in both combining and diverting configurations.

Flow Stability

The 80000 Series is a dual seated design with flow tending to open the valve at both ports. This provides inherent dynamic stable resulting in excellent throttling control performance.

Wide Operating Range

Designs are available in various sizes and can be configured to operate within an extremely wide temperature range. This is accomplished through use of high performance materials and design configurations.

Reduced Emissions

The 80000 Series can be supplied with the Masoneilan LE Packing design to provide low emissions performance meeting various environmental regulations worldwide.

NACE Compliance

Construction for Sour Service Applications in accordance with NACE standard MR 0103 is readily available. Applications requiring compliance to MR 0175, 2003 Rev or ISO 15156 can also be provided.
- Large flow paths offer effective dirty service capabilities and high flow capacities. Heavy valve plug and stem guiding provides dynamic stability resulting in excellent process control and improved process yields.
- Top and bottom entry access to the valve internal components results in easy in-line access for maintenance and repair.
- Extremely rugged design for reliable operation in demanding plant environments and process control applications.

Pressure, Temperature, and Flow Capacity

The Masoneilan 80000 Series is available in ASME pressure classes 150, 300, and 600, covering valve sizes from 0.75 inch (20 mm) up to 12 inches (300 mm) in the standard range, in addition to the 1-10 inch sizing referenced above. Temperature capability depends on body material and bonnet configuration: carbon steel bodies handle -20°F to +450°F with a standard bonnet, extending to +800°F with an extended bonnet; stainless steel covers -148°F to +450°F standard and up to +800°F extended; chrome-molybdenum bodies run from +32°F to +450°F standard and up to +800°F extended. Flow coefficients (Cv) scale with valve size and travel, from roughly 0.6-6.0 Cv on the smallest 0.75-inch valve up to 108-1,080 Cv on a 12-inch valve, giving a 50:1 Cv turndown ratio for precise throttling control across the full travel range.

Leakage Class and Packing Selection

Standard shutoff on the 80000 Series meets Class II per IEC 60534-4 and ASME/FCI 70.2, with Class III or IV available where application service conditions demand tighter shutoff. Three packing options are offered: standard PTFE (Teflon) rated to 450°F, the Masoneilan Low-E low-emissions packing for environmental compliance within its rated pressure/temperature envelope, and flexible graphite packing for service up to 800°F. Spring-diaphragm actuators are available in frame sizes 6, 10, 16, and 23, in Model 87 (air-to-extend) or Model 88 (air-to-retract) configurations, with actuator weights ranging from about 45 to 265 lb depending on size and travel requirement.

Technical Specifications

Size range	0.75″ to 12″ (20-300 mm)
Pressure classes	ANSI/ASME 150, 300, 600 (higher on request)
Temperature range	-148°F to +800°F (material and bonnet dependent)
Flow coefficient (Cv)	0.6 to 1,080 depending on size and travel; 50:1 turndown
Leakage class	Class II standard (IEC 60534-4 / ASME FCI 70.2); Class III/IV optional
Packing	PTFE, Low-E low-emissions, or flexible graphite
Actuators	Model 87/88 spring diaphragm, frame sizes 6/10/16/23; cylinder actuator optional
Sour service compliance	NACE MR0103; NACE MR0175/ISO 15156 on request

Industrial Applications

Three-way control valves in the 80000 Series family are used wherever a process stream must be combined from two sources into one, or diverted from one source to two destinations, under continuous throttling control — common duty points include feedwater heater bypass, temperature control by blending hot and cold streams, tank switching in batch processes, and compressor anti-surge or bypass service in oil, gas, and petrochemical plants. The dual-seated design gives inherent dynamic stability in both combining and diverting service, which matters in applications where flow direction or ratio changes frequently during normal operation rather than staying fixed.

Seven Star LLC supports refinery, gas processing, and petrochemical maintenance teams across Muscat, Sohar, and the wider GCC with genuine Masoneilan valve bodies, trim, and actuator packages, helping specify the correct size, pressure class, and packing option for combining/diverting duty on new projects and valve replacement programs alike.

Sizing and Ordering Notes

Correct 80000 Series sizing requires the combining or diverting flow rates and pressure drop at each port, the process fluid’s properties (viscosity, density, presence of solids or flashing), and the required shutoff class at each seat, since the dual-seated trim behaves differently in combining versus diverting service. Actuator sizing must account for the maximum differential pressure the valve will see across its full stroke, not only at the normal operating point, to ensure the selected spring-diaphragm frame size can stroke the valve fully under worst-case conditions.

Why Seven Star LLC

Seven Star LLC supplies genuine Masoneilan 80000 Series three-way control valves to refineries, gas plants, and process industries across Oman and the GCC. Because the correct combining or diverting configuration, actuator sizing, packing selection, and NACE compliance level depend on the specific process service, our engineering sales team verifies these parameters against your application before quotation, and can provide the official Baker Hughes technical datasheet for your records.

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About brand

Masoneilan has built control valves since 1882, and its Camflex eccentric plug rotary valve and 21000 series globe valve are fixtures in refineries, gas plants and power stations. Every valve carries a serial number and a long model number that defines 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 control valves and actuator series

The globe valve listing centers on the 21000 series, including the cryogenic version with extension bonnet, and the 41005 cage-guided series in high pressure, API 6A and VRT anti-cavitation executions. The 80385 and 80386 are three-way combining and diverting valves. Rotary products include the 35002 Camflex II and the 37002 MiniTork II butterfly control valve. Actuators cover spring-diaphragm, cylinder and rack-and-pinion designs, among them the 5A cylinder actuator for Camflex II. Masoneilan also makes pressure regulators, SVI digital valve positioners and displacer-type level instruments, and offers Lo-dB trim for noise control.

Where Masoneilan valves are used

Throttling duty on steam, hydrocarbons, gas and water is the daily work of these valves: 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 is decisive, since the factory record behind it lists trim, materials and actuator. Send a clear nameplate photo with 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.

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

Frequently Asked Questions

What is the Masoneilan 80000 Series designed to do?

It's a heavy-duty three-way control valve engineered for either combining two flow streams into one outlet or diverting a single inlet stream between two outlets.

What size and pressure range does it cover?

It spans 1" to 10" (25-250mm) with flanged ratings ANSI 150-600 (or UNI-DIN 10-100), NPT threaded connections to 2", and welded end options up to ANSI 2500 on request.

How does the dual-seated design contribute to control stability?

In both combining and diverting configurations, flow tends to open the valve at both ports simultaneously, which creates an inherently dynamically stable plug position and results in smooth, predictable throttling control.

What guiding arrangement does the valve use?

It combines top guiding of the plug with additional guiding at the seat ring locations, giving the trim well-supported, stable movement throughout the stroke even under high flow-capacity, low-pressure-recovery conditions.

Can the 80000 Series be specified for low-emission or sour service?

Yes, it can be supplied with Masoneilan's LE (low-emission) packing to meet fugitive-emissions regulations, and with NACE MR0103 (or MR0175/ISO 15156) construction for sour service applications.

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