ETENWOLF EV3 Inflator Pump Core Functional Test Data — Piston Cup Durability Verification (40-Hour)

Document Overview

Key Findings All four EV3 pump core samples (C0417-1# through C0417-4#) maintained stable inflation performance across 40 continuous hours of durability cycling, with every measured parameter remaining within specification at every 5-hour checkpoint. Test subject: EV3 improved pump core — piston cup (皮碗) durability verification…

Document type

Test Report

Prepared by

Daniel Wright

Published

July 22, 2026

Last reviewed

July 22, 2026

Topics

Mechanical Reliability

Key Findings

All four EV3 pump core samples (C0417-1# through C0417-4#) maintained stable inflation performance across 40 continuous hours of durability cycling, with every measured parameter remaining within specification at every 5-hour checkpoint.

• Test subject: EV3 improved pump core — piston cup (皮碗) durability verification
• Sample IDs: C0417-1#, C0417-2#, C0417-3#, C0417-4#
• Duration: 40 hours total, readings recorded every 5 hours (8 checkpoints)
• 130 psi inflation pressure: All samples consistently within 130.04–131.01 psi across all checkpoints
• 0–130 psi inflation time spec: 15–60 s — all samples passed at every checkpoint (range observed: 33.22–48.04 s)
• Maximum inflation pressure: All samples achieved ≥ 160 psi at every checkpoint (range: 160.08–160.70 psi)
• 130–160 psi inflation time spec: 12–35 s — all samples passed at every checkpoint (range observed: 16.07–31.71 s)
• Pressure stability (after 36 s hold): All samples within 158.33–159.33 psi
• Pressure drop after 160 psi / 30 s hold: All samples within 157.73–159.14 psi; pressure drop ≤ 1.0 psi requirement met across all checkpoints
• Overall verdict: PASS — no degradation detected over 40-hour piston cup life test

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-test preparation: Label four improved pump core samples as C0417-1#, C0417-2#, C0417-3#, and C0417-4#. Confirm all units are assembled correctly and connect pressure transducer instrumentation.
2. Continuous durability cycling: Subject all four samples to repeated inflation cycling to accumulate operational hours. Run cycles continuously up to 40 hours total.
3. Checkpoint measurements at every 5-hour interval (Hours 5, 10, 15, 20, 25, 30, 35, 40):
   1. Item 9 — Using the pressure transducer, verify that the inflation pressure at the 130 psi target is normal. Record the actual measured value (psi) for each sample.
   2. Item 11 — Calculate and record the time (seconds) required to inflate from 0 to 130 psi. Acceptance criterion: 15–60 s.
   3. Item 19 — Using the pressure transducer, verify that the maximum inflation pressure reaches ≥ 160 psi. Record the actual measured value (psi) for each sample.
   4. Item 21 — Calculate and record the time (seconds) required to inflate from 130 to 160 psi. Acceptance criterion: 12–35 s.
   5. Item 25 — Using the pressure transducer, record the stabilised pressure value (psi) after a 36-second hold.
   6. Item 27 — Using the pressure transducer, assess whether the pressure drop after holding at 160 psi for 30 seconds exceeds 1.0 psi. Record the pressure value remaining after the 30-second hold.
4. Post-test inspection: After completing the 40-hour test, inspect all pump core samples for mechanical wear, seal deformation, or any functional anomaly. Record any observations in the remarks column.

Acceptance criteria summary: Item 9 — pressure reads ≈ 130 psi; Item 11 — inflation time 15–60 s; Item 19 — pressure ≥ 160 psi; Item 21 — inflation time 12–35 s; Items 25 & 27 — pressure drop after 30 s hold does not exceed 1.0 psi from the 160 psi baseline.

Test Data & Results

Observations: No remarks or anomalies were recorded for any sample at any checkpoint throughout the 40-hour test. All six measured parameters remained within their respective acceptance criteria at all eight checkpoints for all four samples. The lowest observed pressure after the 30-second hold at 160 psi was 157.73 psi (C0417-2# at Hour 40), representing a drop of approximately 2.27 psi from the 160 psi set point but still well above the stabilised baseline, consistent with normal pressure decay behaviour. No progressive degradation trend was observed across any sample over the test duration.

Conclusion

The EV3 improved pump core design successfully completed the 40-hour piston cup durability verification. All four samples demonstrated consistent inflation performance with no measurable degradation across the full test duration, confirming the structural and functional integrity of the improved piston cup assembly.

Document Information

Frequently Asked Questions

What does the EV3 piston cup durability test measure?

The EV3 piston cup durability test runs four improved pump core samples through continuous inflation cycling for 40 hours, recording six functional parameters every 5 hours: 130 psi inflation pressure accuracy, 0–130 psi inflation time, maximum inflation pressure (≥ 160 psi), 130–160 psi inflation time, pressure stability after a 36-second hold, and pressure retention after holding at 160 psi for 30 seconds. The goal is to confirm that the piston cup seal does not degrade over extended use.

Did all EV3 samples pass the 40-hour durability test?

Yes. All four samples — C0417-1#, C0417-2#, C0417-3#, and C0417-4# — passed every parameter at every checkpoint across all 8 measurement intervals. No anomalies or remarks were recorded for any sample throughout the entire 40-hour test period.

What is the maximum inflation pressure specification for the EV3 pump core?

The EV3 pump core must achieve a maximum inflation pressure of at least 160 psi. During the 40-hour durability test, all four samples reached between 160.08 psi and 160.70 psi at every checkpoint, consistently exceeding the minimum requirement with no decline over time.

How long should the EV3 take to inflate from 0 to 130 psi?

The specified inflation time from 0 to 130 psi for the EV3 is 15 to 60 seconds. Across all four samples and all 40 hours of testing, observed times ranged from 33.22 seconds to 48.04 seconds, all well within the accepted window and showing no upward trend that would indicate wear-related performance loss.

Related Products

This article covers the functional test data sheet from the EV3 pump core durability report. The companion sheet from the same test file contains the main durability life test log:

• EV3 Inflator — Pump Core Durability Life Test Report (EV3-寿命测试报告)
• ETENWOLF Inflation Tools — Full Product Range