Valpes ER35.933S-5 Electric Actuator | 35Nm 24VDC IP65

Valpes ER35.933S-5 Electric Actuator: Precision 35Nm Flow Control

Valpes ER Premier (ER35) is an electric valve actuator that is multi-voltage competent and is designed by European specialists to give ball and butterfly valves smooth automation (Actuated Valve Supplies, 2018a). This model in particular ( ER35.933S-5 ) is designed for 24VDC systems and has an anti-condensation heater and a locked manual override for emergency use. The enclosure is IP65 rated, meaning it is protected from water jets and dust, an important need for chemical processing as well as for aboard marine equipment (OEM Automatic Ltd, n.d.).

The Valpes ER35.933S-5 represents the pinnacle of compact automation engineering, specifically designed for industrial and maritime environments where reliability is non-negotiable. As a marine engineer, I have seen many actuators fail under the stress of humidity and vibration; the ER series stands out due to its robust PA6 housing and high-torque efficiency (Valpes, n.d.). This 24VDC model delivers a consistent 35Nm of torque, making it the ideal choice for quarter-turn or specialized 180° valve operations in tight-access machinery spaces.

Specifications

Features:

1. Increased Rotation Range This device is designed for 180° rotation, as opposed to typical 90° actuators, allowing for flexible control of 3-way valves and unique mechanical connections.
2. Intelligent Thermal Management: Factory-fitted integrated anti-condensation heater controls interior temperature, reducing moisture buildup in high-humidity conditions (Fluxer, n.d.). Fail-Safe Mechanical Override: Features a secured manual override with fold-away handle to allow manual placement in the event of power interruption without removing the cover.
3. Advanced Limit Switches – Equipped with four adjustable micro-switches (2 for motor stop and 2 for volt-free feedback) rated at 5A and offering accurate end-of-travel confirmation (Actuated Valve Supplies, 2018b).
4. Chemical Resistant Housing: The PA6.6 Polyamide housing is highly resistant to corrosive atmospheres and is superior to normal aluminum in salt-spray circumstances.

Maintenance Guide:

• Visual Inspection (Quarterly): Check the cable glands for tightness. A loose gland is the primary cause of IP65 failure.
• Lubrication: The gearbox is lubricated for life; however, if the actuator is used in high-cycle applications, check for grease leakage around the drive bush.
• Heater Verification: Ensure the actuator is permanently powered (even when not moving) to keep the anti-condensation heater active.

Pro Tips by NDMarineTech:

1. Always use a fused power supply. While the actuator is rated for 10W-45W, voltage spikes in DC grids (common on ships) can damage the electronic board (SNAA690000).
2. When mounting to a valve, ensure the Star Drive or Square alignment is perfect. Side-loading the output shaft is the #1 cause of premature gear wear. If the valve requires more than 35Nm break-away torque, always size up to an ER60.