Forged steel ball valve for natural gas pipeline

JONLOO forged trunnion mounted ball valve is equipped with a movable seat seal ring which can generate displacement under the pressure of medium. In case that any medium pressure exists, the pressure will press the valve seat seal ring onto the ball tightly, thus guarantee the sealing performance of the ball valve. The valv

Featured Products

JONLOO forged trunnion mounted ball valve is equipped with a movable seat seal ring which can generate displacement under the pressure of medium. In case that any medium pressure exists, the pressure will press the valve seat seal ring onto the ball tightly, thus guarantee the sealing performance of the ball valve. The valves are made of different materials to be suitable for various media such as water, steam, oil, liquefied gas, natural gas, coal gas, nitric acid, oxidizer, urea and etc.

Size: NPS 2"~48"(DN50~DN1200)
Pressure Rating:Class600lb~2500lb
Body Material: Carbon steel, stainless steel, alloy, etc.
End connection: Flange or Butt welded ends
Operation: Lever, Gear, Pneumatic, hydraulic or Electric actuator optional.

Design & Manufacture:API 608, API 6D, ASME B16.34,
Face to face:ASME B16.10 ,API 6D
Flange Ends:ASME B16.5, ASME B16.47, ASME B16.25
Butt Weld Ends:ASME B16.25.
Test and Inspection: API 6D, API 598

Structual Features

1. Double Block And Bleed(DBB)
When the valve is closed and the middle cavity is emptied through the discharge valve, the upstream and downstream seats will independently block the fluid at the inlet and outlet to realize double block function. Another function of the discharge device is that the valve seat can be checked if there is any leakage during the test. In addition, the deposits inside the body can be washed and discharged through the discharge device to reduce damage to the seat by impurities in the medium.

2. Low Operating Torque
The trunnion pipeline ball valve adopts the trunnion ball structure and floating valve seat, so as to achieve lower torque under operating pressure. It uses self-lubricating PTFE and sliding bearing to reduce the friction coefficient to the lowest in conjunction with the high intensity and high fineness stem.

3. Emergency Sealing Device
The ball valves with the diameter more than or equal to 6″(DN150) are all designed with sealant injection device on stem and seat. When the seat ring or stem O ring is damaged due to accident, the corresponding sealant can be injected by the sealant injection device to avoid medium leakage on seat ring and stem. If necessary, the auxiliary sealing system can be used for washing and lubricating the seat to maintain its cleanliness.

4. Fireproof Structure Design
In case of fire during the use of valve, the seat ring, stem O ring and middle flange O ring made of PTFE, rubber or other non-metal materials will be decomposed or damaged under high temperature. Under pressure of the medium the ball valve will push the seat retainer rapidly towards the ball to make the metal seal ring contact the ball and form the auxiliary metal to metal sealing structure, which can effectively control valve leakage. The fireproof structure design of trunnion pipeline ball valve conforms to requirements in API 607,API 6FA,BS 7655 and other standards.

5. Anti-static Structure
The ball valve is provided with the anti-static structure and adopts the static electricity discharge device to directly form a static channel between the ball and body or form a static channel between the ball and body through the stem, so as to discharge the static electricity produced dut to friction during the opening and closing of ball and seat through the pipeline, avoiding fire or explosion that may be caused by static spark and ensuring system safety.

6. Reliable seat sealing structure
The seat sealing is realized through two floating seat retainers. They can float axially to block the fluid, including ball sealing and body sealing. The low pressure sealing of valve seat is realized by spring pre-tightening. In addition, the piston effect of valve seat is desinde reasonably, which realizes high pressure sealing by the pressure of the medium itself. The following two kinds of ball sealing can be realized.

7. Blow-out Proof Stem
The stem sdopts the blow-out proof structure. The stem is designed with the footstep at its bottom so that with the positioning of upper end cover and screw, the stem will not be blown out by the medium even in case of abnormal pressure in the valve cavity.

8. Corrosion Resistance And Sulfide Stress Resistance
Certain corrosion allowance is left for the body wall thickness. The carbon steel stem, fixed shaft, ball, seat and seat ring are subjected to chemical nickel plating according to ASTM B733 and B656. In addition, various corrosion resistant materials are available for users to select.
According to customer requirements, the valve materials can be selected according to NACE MR 0175/ISO 15156 or NACE MR 0103, and strict quality control and quality inspection should be carried out during the manufacturing so as to fully meet he requirements in the standards and meet the service conditions in sulfurization environment.

Why Choose JONLOO Valves?

Our gate valves are designed for use in demanding oil & gas industry as well as water applications.
Our gate valves are known for being affordable and dependable because we know how important it is for you to keep your facilities and operations running smoothly. We offer the unbeatable combination of low prices, fast delivery, and strong warranties on all of our products.

How to select JONLOO valve for your pipelines?

Valve design and selection of materials are key factors when determining the different oil and gas media applications of valves. The two main things that affect the valve material selection are the strength of the valve and the corrosive media going through the valve.
Strength in a valve is its ability to withstand the internal stresses generated by containing and controlling the fluid under pressure. Strength can be measured in several ways, but the most common measure is by quantifying the metal's tensile strength. Higher pressures are reserved for the stronger steel and high alloy valves as lower pressures can use lower tensile strengths such as cast iron.
The second major consideration in choosing a valve material is its corrosion resistance. Corrosion is the breakdown of a metal due to attack by various chemical reactions. The dangers of corrosion damage are particularly high in the chemical manufacturing industry where the issues of strong chemicals, high pressures and high temperatures cross paths. The harsh acids and other compounds can sometimes eat through metals such as iron and steel in a matter of days or even hours.  In valve materials, basic exterior rusting of the valve is usually secondary to the corrosion going on within the valve due to the unique characteristics of the fluid contained inside it.  In addition to the fluid going through the valve, the temperature of the flow media and the operating environment are other key factors to be considered when determining materials as it relates to corrosion.

Contact us

Please feel free to give your inquiry in the form below We will reply you in 24 hours