FAQs of Butterfly Handle Ball Valve

1. What are the materials of butterfly handle ball valves produced by Plumberstar?

The material is primarily composed of original brass and stainless steel, specifically 304 and 316L.

Body made of brass or bronze and stainless steel.

The ball is made from a forged ball with a polished and chrome-plated finish; meanwhile, a stainless steel ball is also available.

The stem is made from original brass as usual.

Handle is made from aluminum alloy, Zinc alloy, and steel level handle with rubber cover (stainless steel 304 handle also available)

Sealing: PTFE(Teflon) sealing with NBR O-ring;

Screw: It’s made from stainless steel 304 materials.

2. What are the advantages of the butterfly ball valve handle design?

The wing-shaped structure of the butterfly handle increases the grip contact area, and the operating torque can be reduced by 40%-60% compared with the ordinary round handle. The handle is rigidly connected with the valve stem, the switch feedback is clear, and the valve state can be visually judged by the handle position. The wing structure occupies a small space and is well-suited for narrow pipeline installation environments.

3. Is the flow resistance of the butterfly handle ball valve large?

Butterfly handle ball valve produced by plumberstar manufacturer adopts a complete bore design, valve core opening is basically consistent with pipe inner diameter, flow resistance is minimal, pressure loss ≤0.05MPa, lower than other types of valves, such as globe valve and gate valve. The influence of the medium flow rate can be neglected, and the maximum flow rate of the medium can be realized. We can provide the flow coefficient (Cv value) of different caliber valves to help customers accurately calculate pipeline flow.

4. Is the butterfly handle easy to disassemble?

Butterfly handle adopts “bolt fixing” structure, which can be removed only by unscrewing the fixing bolt at the bottom of the handle with an ordinary wrench, without professional tools. Follow-up maintenance replacement is simple. If the handle is damaged, we provide a separate handle accessory supply. Customers can directly replace the new handle without dismantling the entire valve, which will not affect the medium transmission. Maintenance time ≤5 minutes, greatly reducing downtime costs.

5. How about the sealing performance of the ball valve?

Adopt “valve core + valve seat” double seal ( NBR ‘O” ring) structure, valve core after precision grinding, and an elastic valve seat close fit, to achieve a two-way seal. Conventional products leakage rate ≤1×10 Pa·m³/s, in line with ISO 5208 VI sealing standard; for gas, toxic medium, and other special scenarios, can be upgraded to a metal hard seal structure, leakage rate ≤1×10 Pa·m³/s, meet API 6D sealing requirements, ensure no medium leakage risk.

6. What are the general interface specifications for ball valves?

Conventional interface specifications cover 1/4 inch to 4 inches for ball valves. Interface types fully support international standards, including British standards such as BSPP and BSPT, as well as metric standards like DIN 2999, etc. The interface can be customized according to the target market requirements, such as North America priority matching NPT, Europe priority matching BSP/DIN, and interface accuracy in line with ISO 228 standards.

7. What is the Minimum Order Quantity (MOQ) for the ball valves?

The minimum quantity of customized models with special interfaces or materials is 3000 pieces for 1/2-1″, and 1-1/4″-2″. The MOQ ball valve quantities are 1000, and above 2″ the small batch trials (such as 500 pieces) are supported. The trial price is 10%-15% higher than the batch price, mainly covering the mold opening and debugging costs. Large-scale purchase (≥1000 pieces) can enjoy a stepped price. For every 500 pieces purchased, the unit price can be reduced by 3% to 5%. The specific price needs to be calculated in combination with the model and material.

8. How long is the ball valve’s life?

In accordance with the pressure, temperature, and medium requirements, as well as regular inspection of the sealing and cleaning interface, the service life of brass ball valve products is≥8 years, and that of stainless steel ball valve products is≥12 years. The probability of failure, such as seal failure and handle fracture, is ≤ 0.037% per year. The causes of failure are primarily due to overpressure and severe corrosion. We will clarify them in the product manual to reduce the risk of customer use.

9. Customs clearance at export is handled by plumberstar or by the customer?

Flexible arrangements according to trade terms. If FOB and CIF terms are adopted, we are responsible for handling export customs formalities to ensure compliance with the import requirements of target countries. If EXW terms are adopted, customs clearance procedures will be handled by the customer or their designated freight forwarder, and we will fully cooperate in providing the required product information and documentation to assist in the smooth completion of customs clearance.

10. Do Ball valves have special safety designs for flammable and explosive media?

A conductive spring is set at the joint of the valve core and valve stem to conduct static electricity to the valve body grounding and prevent sparks caused by static accumulation. The seal adopts a fireproof structure; even if the seal is accidentally burned, the metal seat can form a temporary seal to prevent the medium leakage and diffusion. This product has passed API 6FA fire protection certification and can be safely used in flammable and explosive environments, such as those containing natural gas and liquefied petroleum gas.