Notice:The original Zhejiang Chaoda valve Co., Ltd upgraded itself to Chaoda Valves Group Co., Ltd, that is the Chaoda Valves Group, and as Chaoda Group for short.


Metal To Metal Sealed Ball Valve

Metal to metal Sealed Ball Valves

The seat material of general purpose ball valve employs generally non-metal material, such as PTFE. Limited by the seat material, the general purpose ball valve can not be used in case of high temperature application, and application medium with solid articles, and ash dregs neither. So, the application scope of general purpose ball valve is restricted partially. Taking this into consideration, CHAODA company has developed successfully after years of hard study full range of metal to metal sealed ball valve, including floating ball valve and trunnion ball valve, which have found extensive applications in such industries as petroleum, chemistry, power, metallurgy, and light industry. The metal to metal seated ball valve made by CHAODA has been patented by the state. 

Excellent tightness function

A unique technique has been employed for the ball grinding, which makes the ball surface reach extreme round and smooth by rotating the ball and grinding apparatus at different directions in space. The tightness function of the valve meets completely and exceeds the standard requirement.

An entire fire safe structure

The metal to metal sealed structure has been adopted for the valve sealing surface design. Packing is so designed with graphite, and gasket is so designed with stainless steel, plus graphite that the valve can assure reliable tightness even if under fire condition.

Natural anti-atatic structure

Metal Hard Seal Ball Valve with its body seat, ball, other metal parts , and so forth, closely contact with each other, having naturally formed a static electricity passage. In this respect, there is no need to provide special anti-static device.

The Metal to metal Sealed Ball Valves developed by Chaoda have following good characteristics: good sealing performance, reliable safety guarantee, long life span and etc.

Metal seated Ball valves are an important mechanical product related with society construction, national defense construction and people's life. Ball valves are used on the pipeline to cut off or connect the flowing of meduim in the process/industries of : The process of mining/refining/transporting Petroleum, natural gas, coal; The manufacturing process of chemicals/pharmacy/food; The system of hydropower, firepower, nuclear power; The rural/urban system of water draining, heating and gas supply; The irrigation and draining system of farmland and also the manufacturing system of metallurgy.

Special form moulding technic has been applied to the QA41Y Metal seated ball valve to ensure more reliable sealing. It could achieve zero leakage with the V-shaped PTFE packing. The ball and stem are integrally casted to avoid the stem blowing out by abnormal pressure. 

Metal Hard Seal Ball Valve

Type: QA41Y,QA47Y,QA341Y,QA347Y
Bore: NPS½~NPS24,DN15~DN600
Rating: Class150~Class2500,PN16~PN160
Material: Carbon Steel,Stainless Steel,Alloy Steel,Duplex Stainless Steel
Operation: Manual,Gear Operated,Electric Operated,Pneumatic Operated
Applicable: Oil,Chemical,Natural Gas,Petrochemical,Coal Chemical and so on
Honor:Zhejiang Famous Brand,Zhejiang Famous Exporting Brand ...


Metal to metal Sealed Ball Valve product description

Metal seated ball valves (Flanged general or butt-welding connection optional) are suitable for using on various kinds of pipeline from pressure Class 150 to Class 2500, PN16 to PN160 to cut off or allow the flowing of medium. By using different material, the valves could be suitable for medium such as water, steam, oil, nitric acid, acetic acid, oxidizing substance, carbamide and etc. Manual/worm gear/pneumatic or electric actuators could be chosen by needs.

To ensure the perfect sealing of the Metal to metal sealed ball valve, we use many advanced hardening technology according to different working condition and needs such as ultro-sonic spray coating, nickel base spray welding, surface specially hardening, STL spray welding, ceramic material with high strength & hardness property. The surface hardness of the ball and seat coulld generally reach more than HRC60, and maximun up to HRC74 and the material of sealing face could stand temperature of 540℃, and maximun 980℃。The bonding strength of material could reach at least 10,000 PSI with good wear-resistant features.

Metal To Metal Sealed Ball Valve product features

Except for such features as wrong operation prevention, stem blow-out proof, mounting pad provited, the metal to metal sealed ball valves made by CHAODA posses the following unique features.

    Advanced hardening technology employed for ball and seat

    Metal to metal sealed design has been employed perfectly for the ball and seat, which has also adopted the advanced hardening technologies, such as ultro-sonic spray coating, nickel base spray welding, surface specially hardening, stellite spray welding, ceramic material with high strength and hardness, and so on. Surface hardness of the ball and seat may generally reach more than HRC60, Maximun is up to HRC74, and application to more than 10000 PSI. Besides, the surface materials posses also very good resistance properties of friction and impact. Metal to metal sealed ball valves made by CHAODA are suitable for use in most criticle working conditions.

    Valve stuck under high temperature prevented

    In the case of high temperature working condition, the valve seat and ball would easily get stuck due to heat expansion, and the valve could not be open. Metal to metal sealed ball valves made by CHAODA employ the patented design of bevelling spring loading, which would absorb the heat expansion of parts caused by the bevelling spring. So, it is ensured that the valve would not get stuck and be open and close easily in the case of high temperature condition.

    Double-block and bleed function

    CHAODA's metal to metal sealed trunnion ball valve is in general of the front ball sealing structure. Actually, two seats of the metal to metal sealed trunnion ball valve can both cut off separately the medium at inlet and outlet to realize double-block function. When the valve is closed, the body cavity and both the bore ends can be blocked with each other even if both ends of the valve are under pressure at the same time, whereas the medium left in the body cavity may relieve through the relief valve.

    CHAODA's metal to metal sealed floating ball valve is of behind ball sealing structure, employing in general single direction tightness. The flow direction is indicated on the valve body. If specially required by customers, CHAODA's patent of bi-direction sealing design may be selected.

     CHAODA VALVES GROUP CO.,LTD. launched its quality management and safety system as ISO9001,ISO14001,OHSAS18001, API6D, CE/PED, API607,API6FA, ISO15848-1 TS and API 600.

Metal To Metal Sealed Ball Valve standards

  Design and manufacture standards:API 6D, API 608, GB/T 12237, BS 5351, GB/T 21385-2008

  Face to face dimensions standards:ASME B 16.10, GB/T 12221

  Flanged Ends standards:ASME B 16.5、GB/T 9112~9124、HG/T 20592、HG/T 20615、JB/T 74~90、JIS B2238

  Testing inspection standards:API 598, GB/T 13927, GB/T 26480, JB/T9092, ISO 5208

Metal To Metal Sealed Ball Valve parts and material

Metal To Metal Sealed Ball Valve main size and weight

CHAODA valves group co.,ltd. Professional manufacturing Metal To Metal Sealed Ball Valve.


How to Order:   

1.Clients could call telephone +86-0577-67319962 or email us your enquiry including following information.

①Valve’s type, End to End dimension ②Connection Ends ③Nominal diameter ④Service medium and temperature and working pressure range
⑤Material, test standard and other requirement ⑥CHAODA could supply all kinds of actuator and spare parts and so on as client’s requirement.

2.When received clients’ enquiry, we would select the suitable valves for your and give you a offer.

3.And have a communication over the Metal To Metal Sealed Ball Valve delivery or other special requirement.

4.When have special requirement on your Metal To Metal Sealed Ball Valve products, please specify it in the purchasing order.

5.Should you have any question, please send email to