FAQs of Butterfly Handle Ball Valve

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

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.

From DuraChoice

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?

This valve uses a double sealing design, made of a valve core and valve seat with an NBR “O” ring. The valve core is carefully polished, and the elastic valve seat fits closely, so the valve can seal tightly in both directions. For standard products, the leakage rate is very low, not more than 1×10 Pa·m³/s, and it meets the ISO 5208 Level VI sealing standard. For special uses, such as gas or toxic fluids, the valve can be upgraded to a metal hard seal structure. In this case, the leakage rate is also ≤1×10 Pa·m³/s and meets API 6D requirements, helping to prevent any risk of fluid leakage.

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

Standard ball valve connection sizes range from 1/4 inch to 4 inches, covering most common pipeline needs. The valve interfaces support many international standards, including BSPP and BSPT (British standards) and DIN 2999 (metric standard). The interface type can also be customized for different markets. All interfaces are made with high accuracy and comply with ISO 228 standards, ensuring safe and reliable installation.

7. What is the 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?

We offer flexible arrangements based on different trade terms. If FOB or CIF terms are used, we will handle export customs procedures and make sure the goods meet the import rules of the destination country. If EXW terms are chosen, the customer or their freight forwarder will take care of customs clearance. 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?

Yes. A conductive spring is installed between the valve core and the valve stem. It helps release static electricity to the valve body and grounding, so sparks caused by static buildup can be avoided.

The seal uses a fire-safe design. Even if the soft seal is damaged by fire, the metal seat can still form a temporary seal to stop the medium from leaking and spreading. This product has passed API 6FA fire test certification and can be safely used in flammable and explosive places, such as systems with natural gas or liquefied petroleum gas.