U Type Butterfly Valve

China U Type Butterfly Valve Supplier

The U-shaped butterfly valve is manufactured by Chinese supplier Shanxi Solid Industrial Co., Ltd. Its features include small size, light weight, and easy installation and maintenance. Its structure is simple and compact, it can open and close quickly at 90 degrees, has small operating torque and has significant energy saving effect. The flow curve tends to be straight, the regulation performance is excellent, and it has the durability of tens of thousands of switching operations. Suitable for various media and wide selection of materials. Comply with EN593, ISO 5752, BS5155 and AWWA C504 standards, working pressure is 10bar, 16bar or 25bar, made of ductile iron.

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Technical Specifications

Material List

How to Select a U Type Butterfly Valve

1. Confirm DN and Pressure Rating

Start with the nominal pipeline diameter and design pressure.

DN alone is not sufficient. The same U Type Butterfly Valve family may be supplied in different pressure configurations, and the available pressure rating can depend on the specific size and construction.

For replacement projects, provide the existing valve nameplate or drawing where possible. This helps confirm not only DN and PN but also face-to-face dimensions and pipeline connection requirements.

2. Match the Pipeline Flange Standard

The valve must match the mating pipeline flanges.

Solid's currently published flange drilling options include DIN 2501, BS 4504 and ANSI B16.1. If your project specification uses another flange standard, provide the exact standard, pressure class and drilling requirement for technical confirmation.

For replacement valves, do not assume that two valves with the same DN and PN have identical flange or face-to-face dimensions.

Select the Seat Material by Medium and Temperature

The seat is one of the most important specification items in a resilient-seated butterfly valve because it directly contacts the medium and forms the shut-off seal.

Solid's published U Type Butterfly Valve seat options include EPDM, NBR, PTFE and Viton.

These are general material-selection references, not a substitute for fluid compatibility confirmation. Send the medium name, concentration where relevant, and operating temperature with the RFQ.

Choose the Disc and Stem Materials

Material selection should follow the operating medium rather than being based only on price.

Ductile Iron Disc

A ductile iron disc can be considered for general water and wastewater systems where the coating and project specification provide the required corrosion protection.

Stainless Steel Disc

SS304 or SS316 may be considered where greater corrosion resistance is required. The correct grade depends on the actual water chemistry, chemical exposure and project specification.

Aluminum Bronze Disc

Aluminum bronze is another published disc option and may be considered for applications where the project requires this material. For seawater service, the complete wetted-material combination should be reviewed rather than selecting the disc material alone.

Stem options published for the U Type Butterfly Valve include SS410, SS416, SS420, SS304 and SS316.

When corrosion resistance is a project requirement, specify both the disc and stem materials instead of writing only “stainless steel internals.”

Select the Operating Method

Solid publishes four operating options for the U Type Butterfly Valve:

manual, worm gear, pneumatic and electric.

Manual or Worm Gear Operation

The operator should be selected according to valve diameter, required operating torque and operating frequency.

For larger valves or applications where a lever would require excessive operating force, a worm gearbox is normally considered.

Pneumatic Operation

Pneumatic actuation is generally selected where rapid or repeated remote operation is required and compressed air is available.

The actuator should be sized according to actual valve torque rather than nominal diameter alone.

Electric Operation

Electric actuation is considered where the valve must be integrated into a remotely controlled or automated pipeline system.

When requesting an actuated U Section Butterfly Valve, provide:

• valve DN and PN;

• supply voltage;

• on/off or modulating operation;

• open/close time where specified;

• control signal;

• enclosure or environmental requirement;

• fail-position requirement where applicable.

The actuator mounting dimensions and valve operating torque should be confirmed before the actuator is selected.

U Type vs Wafer, Lug and Double Flange Butterfly Valves

Solid supplies several butterfly valve body configurations. They should not be treated as interchangeable solely because the pressure and nominal diameter are the same.

The final selection should follow the project drawing, flange configuration, required face-to-face dimension and pipeline maintenance strategy.

Application Selection

Water Supply and Distribution

For clean-water pipeline isolation, start by confirming pressure, flange compatibility, seat material and required approvals.

An EPDM-seated configuration is commonly considered for water service, but potable-water projects may impose additional material or approval requirements. Include these requirements with the enquiry.

Wastewater Treatment

Wastewater service requires attention to both fluid composition and suspended material.

A resilient-seated butterfly valve can be considered for many water and wastewater isolation duties, but the exact solids condition should be provided where the wastewater contains abrasive or fibrous material.

Seawater and Corrosive Water

Do not select a U Type Butterfly Valve for seawater simply because an aluminum-bronze or stainless-steel disc is available.

The buyer should confirm the complete wetted-material combination, including the disc, shaft, seat and any exposed internal components.

Provide salinity, temperature and project material requirements for review.

Industrial Fluid Systems

For oil, air or chemical media, seat compatibility becomes a primary selection variable.

Instead of requesting an “industrial butterfly valve,” specify the exact medium, concentration where applicable, maximum operating temperature, pressure and preferred materials.

Custom U Section Butterfly Valves for Project Specifications

Solid can manufacture ductile iron valves according to customer drawings, samples and requirement specifications.

Confirmed customization capabilities include changes to:

• dimensions;

• shape;

• materials;

• manufacturing or process requirements.

For a custom U Type Butterfly Valve, send the pipeline or valve drawing together with the required DN, pressure rating, flange standard, face-to-face dimension, body material, disc material, stem material, seat material and operating method.

For replacement projects, providing an existing valve drawing or dimensional record can reduce the risk of flange, actuator or installation incompatibility.

Testing and Technical Documentation

The published U Type Butterfly Valve data includes hydrostatic shell and seat test pressures corresponding to the listed working-pressure classes.

Solid's production process for ductile iron valves includes casting, heat treatment, machining, quality inspection and testing. Technical catalogues, including a butterfly valve catalogue, are also available through the Technology Center.

FAQ

1.What is the difference between a U Type and wafer butterfly valve?

Both can be compact butterfly valve configurations, but their body and flange arrangements differ. Select according to the required body style, project standard, flange dimensions and installation arrangement rather than treating them as automatically interchangeable.

2. Can I order PN25 U Type Butterfly Valves?

PN25 is listed within Solid's published U Type Butterfly Valve information. Confirm the required DN with us because the current published size-pressure table does not establish PN25 availability across the complete DN50–DN1200 range.

3. Which seat should I select: EPDM or NBR?

Selection depends on the medium and operating temperature. EPDM is commonly considered for water service, while NBR is commonly considered where oil resistance is required. Provide the exact medium before the seat material is confirmed.

4. Can the U Type Butterfly Valve be supplied with an electric or pneumatic actuator?

Electric and pneumatic operation are both listed options. Provide the DN, PN and actuator control requirements so the valve and actuator configuration can be checked together.

Solid does not specify a fixed general MOQ. Order quantity can be discussed according to the valve size, specification and customization requirement.

Send your specification through the Contact Us page for technical review.