Equipment Warranty Policy

VOHON

After-Sales Service & Contact

Phone / WeChat +86 135 2699 0215
WhatsApp +86 185 3794 6079
Email lixiang@vohonoilpipe.com
Manufacturer Luoyang Wohong Petrochemical Equipment Co., Ltd.
Address W2-1, Dongda Science & Technology Park, Luoxin Industrial Cluster, Xin’an County, Luoyang, China

Response commitment: For warranty claims and urgent faults, our team responds promptly — remote guidance first, then on-site service or parts replacement as required by the warranty terms.

VOHON — Luoyang Wohong Petrochemical Equipment Co., Ltd.

This policy is for general information and may be updated as the product evolves. The version supplied with your unit at the time of delivery prevails.

VOHON · STAGE III VAPOR RECOVERY

Maintenance & Warranty Policy — Stage III Vapor Recovery Unit (WHSH-M)

Warranty commitment, after-sales response, routine maintenance, safety rules, common fault handling and remote management — the dedicated service policy for Vohon WHSH-M Stage III vapor recovery units (air-cooled + membrane / combined-pump versions).

1. Warranty Commitment

Warranty period: Units installed and used in accordance with the manual are repaired free of charge for any fault during the warranty period.

After warranty: Only labor and travel costs are charged; spare parts are supplied at cost price.

With proper installation, correct operation and routine maintenance, the design service life is 8–10 years or more, with low failure rates on major components.

2. After-Sales Response

Service hotline: +86 135 2699 0215 (call for touchscreen alarms or any abnormality)

When an alarm occurs, first check the Fault Analysis Table in Section 5; if the issue cannot be resolved, call the manufacturer's after-sales line and follow the guidance.

3. Routine Maintenance (per the manual)

Assign a responsible person. The unit runs normally during tanker unloading — no operation needed.

Frequency	Item	Key Points
Monthly	Power supply & wiring	Normal supply, tight switch connections, intact grounding (incl. secondary grounding)
Monthly	Piping check	No loose joints or debris; suction/exhaust ports clear with no abnormal noise after start-up
Monthly	Appearance & site	Unit clean, no clutter around, fire extinguisher within validity
Periodic	Vacuum pump	Check oil level via sight glass, top up with dedicated pump oil; replace pump oil periodically

No consumables, no adsorbent replacement — maintenance is mainly inspection and cleaning, keeping running costs low.

4. Safety Rules

Always disconnect the main power before maintenance — never work on live equipment
Never open the explosion-proof junction box cover in a flammable gas environment
Commissioning and maintenance must be carried out by qualified personnel, using a combustible gas detector to confirm concentration is below national safety limits
No open flames or smoking; take anti-static precautions (no nailed shoes or synthetic-fiber clothing)
Electrical work requires certified electricians; power tools are prohibited in explosive gas atmospheres
De-energize before work and hang a "Maintenance / Do Not Switch On" warning sign

5. Common Faults & Troubleshooting (from the manual)

Fault	Possible Cause	Solution
Phase-sequence protection	Wrong phase sequence / low voltage / poor wiring	Check main supply and wiring
Vacuum pump overcurrent	Overheating, mechanical fault, runtime reached	Check and top up oil, check housing temperature, change oil, reset via administrator
High system pressure	Explosion-proof solenoid valve / piping / control system	Check valve and piping, contact manufacturer
Abnormal emission	Solenoid valve, piping, membrane pressure control	Check related parts, contact manufacturer
Phase-sequence alarm	Wiring error, unstable supply	De-energize, swap any two phase wires, eliminate cause

If the fault cannot be resolved, call the after-sales hotline +86 135 2699 0215 for phone guidance or on-site service.

6. Remote Monitoring & Data Management

The unit is equipped with an industrial PC (12.1-inch touchscreen) and WiFi / 4G connectivity, with data uploaded to the cloud:

Mobile APP / web portal for real-time running status, tank pressure, throughput and emission concentration
Environmental data recorded every 30 seconds (inlet pressure / outlet concentration / membrane pressure / temperature)
Automatic alarm history (equipment faults, parameter overruns, emergency stop), queryable
Automatic fault alarm push, enabling prompt after-sales response and remote diagnosis

7. Operation & Training

Simple operation: auto-enters run mode 10 seconds after power-on, unattended auto start/stop
Non-logged-in users can view Running Data and Alarm History; administrators can access Manual, Run Parameters and System Settings
Manufacturer provides operation training during installation and commissioning: daily operation, parameter setting, maintenance and safety notes
New station staff can get up to speed quickly with the operation manual

Unit fault or maintenance questions?

Contact our after-sales team for phone guidance, remote diagnosis and on-site service.

Call +86 135 2699 0215 WhatsApp +86 185 3794 6079 lixiang@vohonoilpipe.com