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Flowserve Analog Positioner Apex 4000

Flowserve Analog Positioner Apex 4000 provides accurate valve positioning for rotary and linear actuators in either double acting or spring return configurations. Flowserve Analog Positioner Apex 4000 may be used with 3-15 psi pneumatic control signals, or fitted with current-to-pressure transducers for 4-20 mA signal inputs. The modular design of Flowserve Analog Positioner Apex 4000 allows for field retrofitting of the I/P options. The compact, lightweight positioner also conforms to NAMUR VDI/VDE 3845 mounting standards and features a low profile visual position indicator. Flowserve Analog Positioner Apex 4000 is available with the following options: high and low flow spool valves and multiple feedback cams.

Product Features

Flowserve Analog Positioner Apex 4000 is a compact, lightweight and cost-effective positioner.
Flowserve Analog Positioner Apex 4000 is suitable for all rotary or linear valves, single valves and single valves.
Flowserve Analog Positioner Apex 4000 is a double-acting positioner.
All exposed parts of Flowserve Analog Positioner Apex 4000 are epoxy powder-coated aluminum structure, which ensures its ability to corrosive environments.
The Flowserve Analog Positioner Apex 4000 has a gold-plated slide valve.

Flowserve Analog Positioner Apex 4000

• Greater reliability from compact, rugged design with few moving parts
• Broad application versatility provided by multiple cam options
• Quick and simple calibration uses thumbwheels and requires only a flat-head screwdriver; span adjustment performed internally with external zero adjustment
• Easy field upgradability to electro-pneumatic I/P options without removing cover

The Apex 4000 positioner causes rotation (or linear movement) of valve actuator in proportion to an input signal. This signal may take the form of pneumatic pressure (Model 4000) or electric current (Models 4100, 4200, 4300 and 4400). Supply pressure is directed to the actuator through a precision spool valve. As input pressure is varied, the balance beam shifts away from its neutral position. The spool also shifts and a differential pressure is created across the actuator causing rotation (or linear movement). Actuator motion is fed back through the positioner shaft and cam. Cam rotation causes movement of the feedback arm, changing compression in the feedback spring, forcing the balance beam and spool back to their neutral positions. This shuts off the flow of air to the actuator and rotation stops.

Product Parameters

Product name Flowserve Analog Positioner Apex 4000
Repeatability 0.5% Full Scale
Hysteresis & Deadband 0.8% Full Scale
Linearity 0.7% Full Scale
Air Capacity @ 60 psi Std. 9.6 SCFM

High 18 SCFM

Position Sensitivity 0.2% of Span
Air Consumption 0.31 SCFM @ 87 psi
Temperature Range -4°F to 185°F
Input Signal 3-15 psi
Max. Supply Pressure 150 psi
Weight 2 lbs

Application and After-Sales Service

The main application areas of valve positioners include:
1. Coal gasification project
2. Clean energy gasification unit
3. Electricity
4. Hydrocarbons
5. Water supply and water treatment
6. Pulp and paper
7. Industrial environment
8. Food and beverage
9. Life sciences and other fields

After-sales service

Online support and Video technical support.

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