Stroke Speed Estimator

Version 2.0, Rev. 17Kinetrol Ltd.
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Calculate:
# Tag / Descriptionⓘ Actual Torque Req.ⓘ(in-lbs) ActuatorⓘType Air Supplyⓘ(PSIG) ActuatorⓘModel Avg. Torque Avail.ⓘ(in-lbs) Timeⓘ(Sec) % Req. TqⓘThru Stroke RequiredⓘCv ★ SafetyⓘFactor MaxⓘSCFM
Avg. Torque Field: SF ≥ 25% — Adequate safety factor | SF 1–24% — Low safety factor | SF ≤ 0% — Insufficient torque
ⓘ Info & Contact — Kinetrol Stroke Speed Estimator (drag to move)

How to Use This Tool

First, select the Solve For mode at the top of the data table:

  1. Required Cv — calculates the valve Cv needed to achieve a target stroke speed.
  2. Stroke Speed — calculates the estimated stroke time based on a known (fixed) valve Cv.

Then complete the data entry for your chosen mode:

  1. Click the appropriate Units button in the title bar: Imperial or Metric.
  2. Select your Air Supply Pressure.
  3. Enter your Actual Torque Requirement (without Safety Factor) in the appropriate unit (in-lbs or Nm).
  4. Select the Actuator Type: Double Acting (DA) or Spring Return (SR).
  5. Select the Actuator Model. Selecting a model auto-populates the Avg. Torque Avail. field. Monitor the Safety Factor and adjust your model selection as needed.
  6. Cv mode: Enter your target Stroke Time (Sec). The Required Cv will be calculated.
    Speed mode: Enter the Known Cv of your installed valve. The Estimated Stroke Time will be calculated.

The Safety Factor is calculated and displayed in both modes.

Use + Add Row to evaluate multiple configurations simultaneously. Switching solve mode clears the Cv / Time fields but retains all other entries.

Notes

• Typical NAMUR mount solenoids flow approximately 0.75 Cv.

• Body-Ported solenoids can provide much higher Cv ratings.

• When selecting solenoids with high Cv ratings, ensure the selected actuator is capable of flowing the required Cv through its air ports. Click "Reference Tables" to see standard Max Cv ratings by actuator group.

• For fast stroke requirements that cannot be accommodated within this utility, other options exist — including Kinetrol Fast Blocks and custom port sizes. Contact Kinetrol for assistance.

• SR Actuator Models: Spring Return actuators use pressure-specific variant part numbers. The model dropdown shows only variants valid at the selected supply pressure. If you change the pressure, the model selection will reset.

• SR Avg. Torque (SSE vs. Actuator Selector): This tool uses the average spring torque through the stroke — (Spring Start + Spring Finish) ÷ 2 — for speed estimation. The Kinetrol Actuator Selector uses Spring Finish (minimum) torque as a conservative sizing basis. The Avg. Torque Available shown here will therefore be higher than the value used for actuator selection. This is intentional and correct for each tool’s purpose.

Contact Kinetrol

• USA:

• Outside USA:

Maximum Cv by Actuator (via standard side air ports)

ActuatorPort SizeMax Cv

Free Air Consumption per Stroke (ft³)

Model60 PSIG80 PSIG100 PSIG

See Kinetrol Technical Document: TD105

Kinetrol Ltd. · Trading Estate, Farnham, Surrey, England GU9 9NU