Zhejiang Langhua Pharmaceutical Co., Ltd.

Company Overview

Zhejiang Langhua Pharmaceutical Co., Ltd. is a comprehensive pharmaceutical enterprise integrating research & development, manufacturing, and global trade. As a subsidiary of Viva Biotech Holdings Group, a global leader in innovative drug discovery, Langhua is committed to delivering efficient, flexible, and high-quality CDMO one-stop solutions for small-molecule drugs—from APIs to finished dosage forms, and from preclinical development to commercial supply, covering the entire drug lifecycle.

In addition, Langhua supplies high-quality generic APIs to global markets and is a major worldwide producer of quinolones, spironolactone, olanzapine, antiviral APIs, and other key pharmaceutical ingredients.

Project Background

Time Accuracy Meets Intrinsic Safety

In pharmaceutical manufacturing, precise time management is essential for:

• Accurate batch production records

• Synchronized process workflows

• Orderly shift handovers

However, in API workshops, chemical synthesis areas, solvent storage zones, and tank farms, the presence of potentially explosive gases makes standard electronic clocks a serious safety hazard.

To eliminate ignition risks while maintaining accurate time management, Langhua Pharmaceutical required a specialized clock system that simultaneously meets:

• National standards for equipment used in explosive atmospheres (GB 3836)

• GMP compliance requirements

• Personnel and asset safety assurance

Core Challenges

Reliable Time Synchronization in Hazardous Environments

1. Safety & Compliance as a Top Priority
   All clocks installed in hazardous areas must hold national explosion-proof certifications (e.g. Ex d IIC T6 Gb / Ex ib IIC T6 Gb), ensuring complete isolation of internal arcs or sparks from flammable gases.

2. Harsh Environmental Conditions
   Chemical corrosion, high humidity, and dust require robust sealing, corrosion resistance, and long-term stability.

3. Unified Time Management
   Dozens of clocks must remain highly synchronized to prevent production record discrepancies caused by time deviations.

4. Clear Visibility & Mechanical Durability
   Time displays must be clearly readable in low-light environments and withstand vibration or accidental impact.

Solution

Shutai Professional Explosion-Proof Clock System

To address Langhua Pharmaceutical’s stringent requirements, Shutai deployed a flameproof (Ex d) and intrinsically safe (Ex ib) clock solution across key hazardous zones, including production workshops, tank farms, and solvent warehouses.

Solution Core: Shutai Explosion-Proof Clock

Intrinsically Safe Design

• Fully designed and manufactured in accordance with GB 3836 standards

• Certified by national explosion-proof authorities

• High-strength alloy or stainless-steel enclosure with specialized sealing structure

• Safety-processed internal circuitry to eliminate ignition sources

Accurate & Automatic Time Synchronization

• Built-in high-precision crystal oscillator

• Supports multiple time-synchronization methods:

• Automatic calibration at power-on

• Manual push-button adjustment

• Optional synchronization with a master clock system

• Ensures consistent time display across all units with no cumulative drift

Outstanding Environmental Adaptability

• Corrosion-resistant enclosure with special surface treatment

• Excellent protection against water, dust, and chemical exposure

• Wide operating temperature range (–20°C to +65°C) for complex plant environments

High-Brightness, Clear Display

• Equipped with high-intensity LED displays

• Clear visibility in dimly lit warehouses and long-distance workshop viewing

Low Power Consumption & Long Service Life

• Power consumption < 5 W

• MTBF ≥ 100,000 hours, significantly reducing maintenance costs and failure risks

Deployment Scope

Dozens of Shutai explosion-proof clocks were successfully installed in:

• API production workshops

• Chemical synthesis areas

• Solvent storage warehouses

• Tank farms and other hazardous locations

This achieved full coverage of critical explosion-risk areas while maintaining unified time management across the site.

Results & Customer Value

• Eliminated Safety Risks
  Standard electronic clocks were replaced with certified explosion-proof devices, fully removing potential ignition sources.

• Full Regulatory Compliance
  Meets GB 3836 explosion-proof standards and GMP requirements, supporting safe and compliant pharmaceutical production.

• Unified, Accurate Time Management
  All hazardous areas now operate under synchronized, accurate time, ensuring reliable batch records and process control.

• Stable Operation in Harsh Conditions
  Reliable performance despite corrosion, humidity, dust, and temperature fluctuations.

• Reduced Maintenance Costs
  Long service life and low failure rate minimize operational disruptions and maintenance workload.