Union Valve

Union Valve China Valve factory, mainly producing Butterfly valve Gate Valve Check Valve Globe Valve Y-strainer Joint/Ball Valve/Flange

Not all check valves are the same.A swing check valve and a dual plate check valve can both stop backflow — but which on...
20/07/2026

Not all check valves are the same.

A swing check valve and a dual plate check valve can both stop backflow — but which one is the better choice for your system?

The answer depends on:
🔹 Pipeline size
🔹 Installation space
🔹 Flow conditions
🔹 Water hammer requirements
🔹 Maintenance considerations

Our new article explains the key differences and helps engineers choose the right solution for pump stations, water supply systems, wastewater treatment, and industrial applications.

👉 Learn more:
https://unionvalve.com/blogs/valve-knowledge/swing-check-valve-vs-dual-plate-which-to-choose

Compare swing check valves and dual plate check valves, including design, performance, water hammer control, and selection tips for different applications.

The right valve selection can make a big difference in pump station performance.Pump stations operate under changing flo...
20/07/2026

The right valve selection can make a big difference in pump station performance.

Pump stations operate under changing flow conditions, and improper valve selection may cause pressure surges, backflow issues, and unnecessary maintenance problems.

So, which valves are typically used in pump stations?

🔹 Gate valves for reliable isolation
🔹 Check valves to prevent reverse flow and protect pumps
🔹 Butterfly valves for large-diameter pipeline shut-off and operation

In our latest article, we share practical guidance on valve selection and configuration for pump stations.

📖 Learn more:
https://unionvalve.com/blogs/valve-knowledge/how-to-select-the-right-valves-for-pump-stations

Learn how to select valves for pump stations, including check valves, butterfly valves, gate valves, and dismantling joints for reliable water system operation.

What Is a Swing Check Valve Used For?A swing check valve is one of the most commonly used check valves in water and indu...
10/07/2026

What Is a Swing Check Valve Used For?

A swing check valve is one of the most commonly used check valves in water and industrial piping systems.

But choosing the right check valve is not only about preventing backflow. Installation conditions, flow characteristics, pipeline design, and system requirements all affect valve performance.

In this guide, we explain:
✅ How swing check valves work
✅ Common applications in water supply, wastewater, HVAC, fire protection, and industrial systems
✅ Installation direction and location considerations
✅ Water hammer risks and how to select the right solution
✅ Comparison with other types of check valves

A properly selected swing check valve can help improve system reliability, reduce maintenance, and protect pumps and pipelines.

📖 Read the full guide:
https://unionvalve.com/blogs/valve-knowledge/what-is-a-swing-check-valve-used-for

Learn what swing check valves are used for, including applications, installation tips, water hammer issues, and selection guidance for piping systems

How Much Pressure Can a Butterfly Valve Handle?The pressure capability of a butterfly valve depends on many factors, inc...
10/07/2026

How Much Pressure Can a Butterfly Valve Handle?

The pressure capability of a butterfly valve depends on many factors, including valve type, pressure rating, body material, seat design, operating temperature, and application requirements.

In this guide, we explain:
✅ Typical pressure ranges of concentric, double offset, and triple offset butterfly valves
✅ Differences between PN and Class pressure ratings
✅ How materials and temperature affect pressure performance
✅ Key factors for selecting the right butterfly valve for your system

Choosing the correct pressure rating helps ensure reliable sealing, longer service life, and stable operation.

📖 Read the full guide:
https://unionvalve.com/blogs/valve-knowledge/how-much-pressure-can-a-butterfly-valve-handle

Learn how much pressure a butterfly valve can handle, including PN and Class ratings, pressure ranges, and key factors for proper valve selection.

Can butterfly valves be used for slurry service?The answer is yes — but only under suitable light slurry conditions.For ...
03/07/2026

Can butterfly valves be used for slurry service?

The answer is yes — but only under suitable light slurry conditions.

For wastewater sludge, light sand-containing water, low-concentration lime slurry, and wastewater with suspended solids, butterfly valves can be a practical and cost-effective option when the valve material, seat design, and flow conditions are properly selected.

In this guide, we explain where butterfly valves can be used, which slurry applications should be avoided, and how to select the right valve type and materials.

Read more:
https://unionvalve.com/blogs/valve-knowledge/butterfly-valves-for-light-slurry-applications-selection-guide

Learn when butterfly valves can be used for light slurry, wastewater sludge, and water systems with suspended solids.

Choosing the right stainless steel grade is important for butterfly valve performance.304 is suitable for general water ...
03/07/2026

Choosing the right stainless steel grade is important for butterfly valve performance.

304 is suitable for general water and food applications.
316 offers better resistance to chloride and chemical corrosion.
316L is a better choice for welded or more demanding corrosive environments.

For seawater, brine, coastal projects, or chemical systems, the material grade can directly affect valve service life and reliability.

Learn more in our latest guide:
https://unionvalve.com/blogs/valve-knowledge/304-vs-316-vs-316l-stainless-steel-butterfly-valves

Learn how to choose stainless steel butterfly valves by grade, including 304, 316, 316L, and 2205 for water, seawater, and corrosive media.

Choosing the right butterfly valve for chemical service is not only about size and pressure rating. Material compatibili...
26/06/2026

Choosing the right butterfly valve for chemical service is not only about size and pressure rating. Material compatibility is the key to long-term performance.

In our latest article, we explain how to select chemical resistant butterfly valves for acids, alkalis, seawater, chemical wastewater, dosing systems, and other corrosive media.

The guide covers PTFE seats, PTFE lining, PTFE-coated discs, body material selection, common applications, and key factors to confirm before valve selection.

Read the full article here:
https://unionvalve.com/blogs/valve-knowledge/how-to-choose-a-chemical-resistant-butterfly-valve

Learn how to choose chemical resistant butterfly valves for acids, alkalis, seawater, wastewater, and corrosive media with proper materials.

Fire protection systems require reliable valves that can operate properly when they are needed most.In our latest articl...
26/06/2026

Fire protection systems require reliable valves that can operate properly when they are needed most.

In our latest article, we explain how to choose the right fire protection butterfly valve for sprinkler systems, fire hydrant systems, fire pump rooms, and fire water pipelines.

You will learn about common valve types, signal switches, material selection, and key points to confirm before quotation or purchase.

Read the full guide here:
https://unionvalve.com/blogs/valve-knowledge/how-to-choose-fire-protection-butterfly-valves

Learn how to choose fire protection butterfly valves, including types, applications, materials, signal switches, and UL/FM approval requirements.

🌊 Hydro Power Butterfly Valve Selection Guide | Union ValveIn hydropower plants, butterfly valves play a critical role i...
18/06/2026

🌊 Hydro Power Butterfly Valve Selection Guide | Union Valve

In hydropower plants, butterfly valves play a critical role in controlling high-flow water systems that directly impact turbine operation and plant safety.

This guide explains how butterfly valves are used in hydro power applications, including:
🔹 Main functions in turbine inlet systems
🔹 Common installation positions (penstock, bypass, cooling & drainage systems)
🔹 Typical valve types (double eccentric, hydraulic, counterweight, accumulator)
🔹 Key selection factors such as pressure, sealing, and control method

Choosing the right valve structure and actuator is essential for stable, safe, and efficient hydropower operation.

👉 Read the full article here:
https://unionvalve.com/blogs/valve-knowledge/hydro-power-butterfly-valve-selection-guide

Learn how butterfly valves are used in hydro power plants, including functions, installation positions, common types, and key selection points.

🌊 Marine Butterfly Valve Selection Guide | Union ValveChoosing butterfly valves for marine and offshore systems is not j...
18/06/2026

🌊 Marine Butterfly Valve Selection Guide | Union Valve

Choosing butterfly valves for marine and offshore systems is not just about size and pressure. Seawater corrosion, system type, connection method, certification, and testing requirements all play a critical role in valve performance and service life.

In this guide, we explain how to properly select marine butterfly valves for different ship systems such as seawater cooling, ballast water, fire fighting, HVAC, and desalination systems. You will also learn key material choices, connection types, and classification society requirements.

🔧 Key focus:

System-based selection
Material & corrosion resistance
Wafer / Lug / Flanged options
Marine certification requirements
Practical selection tips

👉 Read the full guide here:
https://unionvalve.com/blogs/valve-knowledge/marine-butterfly-valve-selection-guide

Learn how to choose marine butterfly valves by system, material, connection type, certification, and testing requirements for ship and offshore use.

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小站工业园
Tianjin

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Thursday 09:00 - 17:00
Friday 09:00 - 17:00

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+862266224148

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