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Brand: Flowserve
Flowserve Automax SuperNova Pneumatic Actuator S050-SN300
Description
Automax SuperNova rack and pinion pneumatic actuator, S050 to SN300
The Flowserve Automax SuperNova (S Series) is a pneumatic rack and pinion actuator for quarter-turn valves such as ball, plug and butterfly valves. It is built as a spring-return version, where springs drive the valve to its fail position on air loss, and as a double-acting version that uses air in both directions.
Seven Star LLC supplies the SuperNova range in Oman and the GCC as an independent supplier in Muscat. This is a model series from S050 to SN300, so the actuator size and spring set are selected from the valve torque and the air supply.
SuperNova technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Flowserve Automax / SuperNova (S Series), models S050 to S200 and SN250, SN300 |
| Type | Rack and pinion; spring return (S) and double acting (D) |
| Body | Hard anodised aluminium alloy, internal and external |
| End caps | Aluminium with oven-cured epoxy coating |
| Pinion | Nitride-coated steel; stainless steel pinion optional |
| Valve mounting | ISO 5211 / DIN 3337 (star drive) |
| Accessory mounting | NAMUR VDI/VDE 3845 for solenoid, limit switch and positioner |
| Temperature, standard | -20 to 80 °C |
| Temperature, options | -50 to 80 °C low; -20 to 150 °C high |
| Rotation | 180 ° standard; options up to 250 ° |
| Double-acting torque, 5 bar | S050D 16 Nm to SN300D 3,128 Nm |
| Double-acting torque, 8 bar | S050D 25 Nm to SN300D 5,005 Nm |
| Safety / hazardous area | SIL 2 (IEC 61508); ATEX 94/9/EC |
| Pressure vessel status | The manufacturer states PED does not govern actuators of these sizes |
How the SuperNova actuator works
Air pushes two pistons that carry racks, and the racks turn a central pinion. The pinion shaft drives the valve through the ISO 5211 connection. In the double-acting model air acts in both directions and torque is constant over the travel. In the spring-return model, springs in the end caps give the return stroke, so torque varies with position: spring start and end values and air start and end values must all be compared with the valve torque.
Concentric springs and field-reversible construction mean that the fail position can be changed on site by reversing the pistons. Independent open and closed travel stops are standard on S050 to S200, which allows precise end-position setting.
Sizing a SuperNova actuator
For double acting actuators, take the maximum static torque of the valve, add a safety factor of usually 25 to 50 percent depending on valve type, and select the model whose torque at your minimum air pressure meets that value. Spring return units are sized the same way but compared with the lower of the spring-end and air-end torque. Spring sets 04 to 12 are available, and the standard spring configurations are balanced for supply pressures of 3, 4, 5 and 5.5 bar.
Examples from the torque table: a S100 double-acting unit gives 113 Nm at 5 bar, a S150D gives 478 Nm at 5 bar, and a S200D gives 1,021 Nm at 5 bar. Final selection should always follow the manufacturer’s torque table for the exact spring set.
SuperNova selection and ordering checklist
- Valve type, size and maximum torque, including safety factor.
- Fail action: spring return (close or open) or double acting.
- Minimum and maximum air supply pressure.
- Valve mounting standard and drive dimensions (ISO 5211 flange and star size).
- Ambient temperature and need for low or high temperature option.
- Coating needs, for example MaxGuard for corrosive atmospheres.
- Accessories: NAMUR solenoid, limit switch box, positioner.
- Rotation angle if different from 90 °.
Installation and maintenance of SuperNova actuators
Fit the actuator to the valve with the correct bracket and coupling, align the pinion and the stem, and set the travel stops with the valve in the open and closed positions. Use clean, dry air; the design can work with non-lubricated air. Maintenance on site needs no special tools, and repair kits include the O-rings, piston guides and bearings, so a complete overhaul is practical.
Fit spring cartridges only as supplied; never open an end cap on a spring-return unit with the springs under load without the procedure in the manual. Stroke the valve periodically, since a long-idle valve often shows the highest breakaway torque.
SuperNova applications in Oman and the GCC
These actuators operate on-off and emergency shutdown valves at oil and gas facilities, power plants, water treatment and desalination, and petrochemical plants. Outdoor sun, dust and salt air make the coating, the stainless fasteners and the high temperature option relevant, and the SIL 2 rating supports use in safety instrumented functions.
For emergency shutdown duty, the spring-return actuator is the usual choice because the springs return the valve without air. For modulating control, a double-acting unit with a positioner is common. Tell us which role the valve plays so that the spring set, volume booster or fast-acting option can be suggested accordingly.
SuperNova model overview
| Models | Description |
|---|---|
| S050 to S200 | Spring-return and double-acting; independent open and closed stops |
| SN250, SN300 | Larger spring return and double-acting sizes; spring sets 05 to 12; double-acting up to 5,005 Nm at 8 bar |
Information to send with a SuperNova RFQ
- Valve make, type, size and mounting flange or drive size.
- Required torque and fail position.
- Air supply pressure and ambient temperature.
- Accessories and coating requirements.
- Quantity.
Documents and quotation
A manufacturer datasheet for the SuperNova is attached on this page for reference. Please send the duty data and the options you need, and we will prepare a quotation.
Seven Star LLC is an independent supplier in Muscat serving Oman and the GCC. Delivery time and availability are confirmed per enquiry.
Datasheets & Documents
- Datasheet Flowserve Automax SuperNova Datasheet Download
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About brand
Flowserve is the American flow control company for pumps, valves, mechanical seals and valve automation, known through brands such as Durco, Worthington, Byron Jackson, Valtek, Limitorque, Worcester, Logix and Argus. It was formed on 22 July 1997 by the merger of equals of Durco International and BW/IP, whose heritage reaches back to Simpson & Thompson (1790) and Byron Jackson (1872). Flowserve Corporation is headquartered in Irving, Texas, and listed on the New York Stock Exchange.
Seven Star LLC sources and supplies Flowserve pumps, seals, control valves, ball valves, actuators and positioners for process plants in Oman, working from the nameplate data and the manufacturer's documentation.
Flowserve company profile
| Formed | 22 July 1997, merger of Durco International and BW/IP |
|---|---|
| Heritage companies | Simpson & Thompson, later Worthington Simpson (1790); Byron Jackson (1872); Duriron foundry, later Durco (1912) |
| Headquarters | Irving, Texas, USA |
| Ownership | Flowserve Corporation, public company (NYSE: FLS) |
| Product families | API and ANSI process pumps, Durco and Worcester ball and plug valves, Durco TX3 triple-offset and Valtek butterfly and globe control valves, Limitorque electric actuators, Logix positioners, mechanical seals |
Milestones
- 1790: Thomas Simpson founds Simpson & Thompson, a predecessor of Worthington Simpson pumps.
- 1872: Byron Jackson is founded, a root of BW/IP.
- 1912: The Duriron foundry, later Durco, is launched.
- 1997: Durco International and BW/IP merge on 22 July to form Flowserve, listed on the NYSE as FLS.
Flowserve product families listed here
Flowserve pumps on this page are the Durco Mark 3 ANSI process pump and the ECPJ vertical sump pump built to API 610 type VS4. Sealing products are the ISC2 cartridge mechanical seal to API 682 and DuraClear barrier fluid for dual seal systems. Flowserve valves include the Valtek Mark One globe control valve, Argus floating and trunnion-mounted ball valves (EK71, FK79, FK76M) and Durco Microfinish ball valves. Automation is covered by Limitorque MX and L120 multi-turn electric actuators, the Rotadisk RD and RDF pneumatic actuator and the Logix 3800 digital positioner.
Where Flowserve equipment is used
Mark 3 pumps handle acids, caustic, solvents and utilities in chemical and petrochemical units. VS4 sump pumps drain pits and collection tanks. Valtek control valves and Argus ball valves are found in refining, gas processing, power and desalination, and Limitorque actuators operate gate and globe valves on pipelines, tank farms and water networks across the GCC.
Flowserve products we list
Ordering Flowserve parts: what we need
The serial number on the nameplate is the key to Flowserve records for a pump, valve or actuator. Please add the following by product type:
- Pumps: size and model, impeller diameter, materials, seal arrangement, and the part name and item number from the sectional drawing
- Mechanical seals: seal type and size, drawing or part number, materials code, pumped fluid and flush plan
- Valves: size, pressure class, body and trim materials, end connections, and the actuator and positioner model
- Limitorque actuators: unit size, order and serial number, supply voltage, wiring diagram number
Facts checked against Flowserve's SEC filings and published company histories, October 2026.
Browse Flowserve products by category: Control Valves, Pumps, Valve Actuator, Valve Positioner.
FAQ
Questions about the Flowserve Automax SuperNova Pneumatic Actuator
Answers from our engineering team on installation, compatibility and integration.
01What is the SuperNova actuator?
It is an Automax rack and pinion pneumatic actuator in spring-return and double-acting forms, for turning quarter-turn valves.
02What mounting standards does SuperNova follow?
The valve connection is ISO 5211 / DIN 3337, and accessory mounting follows NAMUR VDI/VDE 3845 for solenoid, limit switches and positioners.
03What temperatures can it work at?
Standard is -20 to 80 °C. Options extend this to -50 °C or to 150 °C, depending on the version.
04Is the SuperNova SIL rated?
The datasheet lists SIL 2 to IEC 61508 and ATEX 94/9/EC. The actual certificate should be checked for your model and configuration.
05Can the fail position be changed?
Yes. The spring-return actuator is fully field reversible, so the spring failure direction can be changed on site.
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