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Only Focus On The Sight Glass

Provide the highest quality sight glass, level gauge valves, and flow indicators for industrial fluid systems. Trusted by clients in over 30 countries since 1998.

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About Winocean

Since its founding in 1998, Hengshui Winocean Co.Ltd. has grown rapidly with an annual growth rate of 40%. In 2020, we expanded our operations with a new workshop, bringing our total factory area to nearly 20,000 square meters.

As a professional manufacturer based in Hengshui City, Hebei Province, China, we specialize in reflex transparent tubular gauge glass, level gauge valves, oil sight glasses, and flow indicators. Our products are exported to more than 30 countries worldwide.

1998

Founded

20,000m²

Factory Area

30+

Countries Served

Winocean Factory Workshop

Why Choose Winocean?

Direct Factory Pricing

As a manufacturer, we offer the lowest prices compared to trading companies. No middlemen, no markups — just high-quality products at competitive rates.

In-Stock Availability

With an 800m² warehouse, we maintain stock for fast delivery. Minimum order is just 1 piece — ideal for replacements and small projects.

Professional Support

Our dedicated after-sales service team ensures technical support, fast response, and long-term partnership with every client.

Our Featured Products

Explore our premium range of sight glasses, level gauges, and flow indicators designed for durability, clarity, and precision in industrial applications.

Redline High Pressure Tubular Gauge Glass

Redline High Pressure Tubular Gauge Glass

Heavy-wall design for high-pressure boiler systems. Durable redline marking for clear level visibility.

  • High-pressure resistant
  • Redline marking for clarity
  • Suitable for steam boilers
Reflex Boiler Plate Sight Glass

Reflex Boiler Plate Sight Glass

Flat reflex design with seal gasket for secure installation in boiler systems.

  • Reflex pattern for clear water/steam interface
  • High-temperature resistant
  • Includes sealing gasket
Square Impeller Flow Indicator

Square Shape Impeller Flow Indicator

Double clip type with square housing for visual flow monitoring in pipelines.

  • Clear impeller movement visibility
  • Corrosion-resistant materials
  • Easy installation
Bronze Needle Level Gauge Valve

Bronze Liquid Needle Level Gauge Valve

Precision bronze valve for accurate liquid level control in industrial tanks.

  • Durable bronze construction
  • Needle control for fine adjustment
  • Leak-proof sealing
Thread Visual Impeller Flow Indicator

Thread Visual Impeller Flow Indicator

Compact threaded design for inline flow monitoring in liquid systems.

  • Threaded NPT/BSP connections
  • Real-time flow visualization
  • Suitable for water, oil, and chemicals
Transparent Reflex Flat Gauge Glass

Transparent Reflex Flat Gauge Glass

Dual-function glass with transparent and reflex zones for accurate level reading.

  • Combines transparency and reflex
  • High clarity and durability
  • Ideal for boiler applications

Complete Liquid Level Gauge Indicator

Fully assembled level gauge systems with valves, guards, and illumination options.

  • Ready-to-install kits
  • Customizable configurations
  • Suitable for high-pressure tanks

Oil Level Sight Glass Indicator

Designed for lubrication systems, gearboxes, and oil reservoirs.

  • Resistant to oil degradation
  • Clear visibility even in low light
  • Brass or stainless steel housing
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Key Features

High-Temp Resistant

Our gauge glasses withstand extreme temperatures up to 500°C, ideal for boiler and steam systems.

Corrosion Resistant

Materials selected for resistance to water, oil, steam, and industrial chemicals.

Precision Engineering

Tight tolerances and quality control ensure reliable performance and leak-free operation.

Fast Global Delivery

In-stock items ship within 48 hours. DHL, FedEx, and sea freight options available.

1998

Founded

20,000+

Factory Area (m²)

30+

Countries Served

40%

Annual Growth Rate

Frequently Asked Questions

What materials are used in your sight glasses?

We use high-quality borosilicate glass (Duran type), tempered glass, and redline glass for optical clarity and thermal resistance.

Can I order a single piece?

Yes, our minimum order quantity is just 1 piece. We keep many items in stock for fast delivery.

Do you offer custom designs?

Yes, we accept OEM/ODM orders. Provide your drawings or specifications and we’ll manufacture to your requirements.

What are your delivery times?

In-stock items ship within 1-2 business days. Custom orders typically take 15-25 days depending on complexity.

How do I install a reflex gauge glass?

Each product comes with installation guidelines. We also offer technical support via email or WhatsApp for assistance.

Get in Touch

Have questions about our products or need a quote? Contact us directly through our official website.

Contact Information

Email: Sales@winoceanliquid.com

WhatsApp: +8616633801151

Phone: +86-0517-3408880

Skype: live:.cid.c0c0b215cc6c6278

Address: Weiwu Road, Economic Development Zone, Hengshui City, Hebei Province, China

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