Gnee steel group is a supply chain integrated enterprise including steel plate, coil, profile, outdoor landscape design and processing. Founded in 2008, with 5 million RMB registered capital, Gnee has made impressive progress and development in steel market with Gnee People more than 15 years hard fighting. At present, the total investment amount reaches 30 million RMB, workshop area more than 35000㎡, with over 200 employees. Gnee is becoming the most professional international steel supply chain company in China central plains with explicit strategic framework, integrated governance structure, firm management foundation, abundant fund and human power.
Why Choose Us?
Our products
GNEE Group specializing in the manufacture and distribution of high quality valves and fittings for a wide range of industrial applications including water supply, sewage systems, oil and gas, and marine treatment.
Sales market
GNEE valves have been exported to more than 150 countries around the world, and every year more than 50 customers visit the GNEE Group and order more than 30,000 pieces of valves.
Our team
Established in 2008 with a registered capital of RMB 5 million, GNEE Group At present, the company has a total investment of 30 million yuan, a plant area of more than 35,000 square meters and more than 200 employees.
Customer service
GNEE Group always puts product quality and customer needs first, and strives to provide better services to each of our customers. We follow the latest standards and focus on management, technology and process innovation. With a mature sales service system, GNEE Group insists on providing one-stop service to every customer.
The API 6D ball valve is designed in accordance with API 6D, the ball valve is connected by bolts, the seat ring is trunnion mounted, and the spring is loaded to ensure contact with the ball, even if the pressure difference between the cavity and the downstream closure is low.
Valve Certificate: API 6D,ISO9001:2008,ISO14001
Place of Origin: Henan, China (Mainland)
Delivery details: Ship within 15-30 days after payment
Double Block And Bleed Ball Valve
A DBB ball valve is a combination of one or more shut-off/isolating ball valves and one or more bleed/bleed valves (usually ball or needle valves). Dual stop valves and bleed valves work to isolate upstream and downstream process flow/pressure.
Cryogenic ball valves are designed for cryogenic media in cryogenic processing plants, such as liquid gases CO2, N2, Ar, O2 natural gas (LNG). The valve features a spring-loaded seat ring system that ensures easy ball switching at temperatures as low as -200°C.
Electric High-Pressure Ball Valves
Size Range: 1/2"~8", DN15~DN200
Operating Pressure: 1.6MPa
Control Mode: On Off Type / Modulating Type
Optional Voltage: DC12~24V (±10%), AC110~220V, 50/60Hz
Full port: 1/2" up to 36"
Working pressure: Class 150, class 300,claa600,class 900,class1500,class 2500
Working temperature: -20ºC/+180ºC
Size: 1/2"-8"
Pressure Rating: CLASS150/CLASS300/CLASS600/CLASS900
Flanged end&Blow-out proof stem&Fire safe construction&Anti static device
Stainless Steel Flanged Ball Valve
Package: Standard Exporting Plywood Case
Shipping Port: Ningbo/Shanghai, China
Shipping Terms: EXW, FOB, CFR, CIF, etc.
Payment Terms: T/T, Western Union, PayPal, etc.
MOQ: 1 set
16 years of valve manufacturing experience
Strong inventory, part of commission returned for bulk delay
Product quality will be guaranteed for 1 year (12 Months)
What is Trunnion Ball Valve?
Trunnion ball valves are quarter-turn valves used to stop or start the flow of a media in a pipe. The most common type of ball valve has a "free floating" design, so the trunnion type is a design change. Within a trunnion ball valve the ball connects to the stem on one end and on the other end a shaft called the trunnion. Due to this design change, the ball is held firmly in place. In a floating ball valve, the ball is only connected to the stem, and is therefore called floating.
Firesafe design
Secondary metal seat design provides a firesafe shut off per api 607. Additionally, secondary graphite body seals and flexible graphite packing prevents leakage through the body joints and stuffing box, respectively.
Internal trunnion design
Upper and lower bearing plates hold the ball in place, preventing the ball from floating axially and avoiding excess load on the seats. External trunnion design available in certain sizes.
Double seals on body joints
Primary elastomeric seals ensure zero leakage in standard operating conditions. Secondary graphite seals ensure proper body joint sealing per api 607 in extreme temperature scenarios.
Anti-static devices
Standard anti-static devices ensure electrical continuity between the ball, stem, and body, eliminating the possibility of sparks within the valve created by static electrical charges.
Blowout-proof stem design
Valves are designed with stem/body connection preventing stem blowout under line pressure.
High-pressure rating
The trunnion design allows them to handle significantly higher pressures compared to floating ball valves.
Reliable shut-off
The positive sealing mechanism ensures a leak-proof closure, which is critical for applications where safety and environmental concerns are paramount.
Durability
The robust construction with superior materials makes them resistant to wear and tear, ensuring a long service life.
Low maintenance
Trunnion ball valves generally require minimal maintenance due to their simple design and high-quality components.
Quick operation
The quarter-turn operation allows for rapid opening and closing of the valve, which is essential for emergency shut-off situations.
Versatility
Trunnion ball valves are available in a wide range of sizes and materials, making them suitable for diverse applications.
Types of Trunnion Ball Valve
Side Entry Trunnion Ball Valve
It has the balls assembled on its side, with a body joining two or three pieces to form an extension. Among the pieces, the largest one is responsible for holding the ball.
Top Entry Trunnion Ball Valve
The top entry trunnion ball valve has a design that illustrates the assembly of balls from the upper top to the lower part. The design consists of a bonnet cover at the ball valve top which is easily dettachable.
Welded Body Trunnion Ball Valve
The trunnion ball valve has an anti-blowout stem with a valve seat design. This design is achievable through the application of various materials such as the carbon steels and martensitic ss.
It is mainly applicable in the transmission of gas through underground pipelines.
Full Port Trunnion Mounted Ball Valves
These types of valves exist based on the type of bores. In most cases, their design is such that the diameter of the valve bore is nearly equal to the connecting pipeline.
They are applicable in the chemical and refining industries.
Half Port Trunnion Mounted Ball Valve
This is a unique design that we obtain based on the type of its bores. Here the diameter of the bore is half the size of that of the pipeline in which it connects.
Two-piece Trunnion Mounted Ball Valves
This is a type that comes out based on the assembling of parts. It has two housing pieces that attach themselves via thread-like connections. Besides, the design allows for easy access of the valve for repair purposes.
Three-piece Trunnion Mounted Ball Valve
The design results when we assemble the three housing pieces together. This specific type of design enables easy access of the valve's inner parts by detaching the pieces.
Oil And Gas Industries
Trunnion mounted ball valves are perfect for a wide range of applications among several oil and gas industries. Examples of oil and gas industries that utilize trunnion mounted ball valves include gas feed lines, field gas plants, industrial gas processing plants, oil refinery feedstock lines, and crude oil plants.
Pipeline Industries
The ability of trunnion mounted ball valves to handle several different applications such as gasses, slurries, and liquids make them highly valuable in the pipeline industry.
Hydrocarbon Industries
Because trunnion mounted ball valves are useful for the facilitation of hydrocarbon processing, they are extremely popular among hydrocarbon industries.
Power Industries
Trunnion mounted ball valves are suitable for numerous applications such as turbines, skids, generators, compressors which are integral to the operation of power industries.
Chemical Industries
Offering incredible safety, durability, and sealing capabilities, trunnion mounted ball valves suit a wide variety of chemical industries where such competencies are imperative.
Components of Trunnion Ball Valve
Body
The ball valve's body is the casing that supports the inside of the valve and keeps it in place. Based on the function it will receive, the substance for this design may be constructed of various products. Carbon steel, stainless steel, duplex, low-temperature carbon steel, Inconel, and super duplex are a few of the materials that are frequently utilized.
Ball
It rotates through a disc with a sphere-like form to halt or start flow in a steady rotation. On one end, it is attached to the Trunnion, and on the other, to the stem. While it takes turns, the ball is secured in place. The seats of the Trunnion ball valve frequently get into touch with this ball, lowering the torque.
Seat
The Trunnion ball valve's seat is a design element that encircles the ball. The seats hold the ball firmly in place when the actuator is switched on, preventing access. There are two varieties: soft and metal, which causes it to move in the ball's general direction.
Trunnion
The trunnion ball valve has an additional shaft that holds the ball in place from below, which is called Trunnion. Its purpose is to maintain the ball's tight attachment. In some Trunnion mounted ball valves, the Trunnion is an attachment of the spherical ball, and the rest of the time, it is connected to the spherical ball disc through welded joints.
Stem
The ball and the actuator are connected by the trunnion ball valve's stem. It is attached to the ball by an extra shaft, which aids in keeping the ball firmly in position. Additionally, it controls how the ball moves. Trunnion-mounted ball valves retain stronger anti-blowout stems, which allows them to withstand high pressures and temperatures without suffering any harm.
Disk
A perforated, solid ball is the shape of the disc in a Trunnion ball valve. The ball is attached to the stem on one side, and on the other, to the Trunnion. The ball or disc in a Trunnion ball valve is stabilized while it revolves. Because the seats are always in touch with the ball, torque is decreased.
Actuator
A trunnion ball valve's actuator is utilized to open or shut down the valve. Based on the application and medium, like air-operated ball valves, numerous types of actuators are utilized in ball valves. On a valve, typical actuators include bare stems, hand levers, pneumatic actuators, gears, and hydraulic actuators. Additionally, you can utilize a motor-operated actuator, a hydraulic-operated actuator, an electric actuator, a gas actuator, gas-over-oil actuator, and more.
Injection
In the seat and stem region, injection fittings are created. Grease can be inserted using a sealant injection fitting when sealing is weakened, and leakage starts. A partial seal is created by the injected sealant to halt additional leaking. The sealant injection fittings are only to be utilized in emergencies.
1.Clean and inspect all parts for damage and change part(s) as necessary.Notice：
If complete disassembling becomes necessary, replacement of all seats and seals is recommended.
2.Place the body on a clean wooden surface.
3.Coat body studs with anti-corrosive paste.
4.Place both end connectors with their flange surfaces resting on a clean wooden surface.
5.Place the springs in holes provided on connectors or the seat and fit the O-ring on seat assembly.
6.Fit the seat O-ring on the seat assemblies. Lower the seat assemblies into the connectors.
7.Fit the O-ring (body) and the body gaskets on both the connectors.
8.Fit the O-ring (stem) and thrust washer (stem) on the stem.
9.Locate the stem in the stem housing.
10.Fit the O-ring (stem housing) and gasket (stem housing) into the stem housing.
11.Fit the thrust washers (trunnion) on the top and bottom flats of the ball.
12.Fit the ball trunnion bearing into the bearing bore in the bearing retainer.
13.Fit the bearing retainer onto the ball trunnion.
14.Assemble the packing energizer, packing kit, O-ring [(stem) and (stem housing)], and thrust washer (stem) onto the stem.
15.Lift the ball and lower it into the body in the appropriate position.
16.Locate the stem in the ball recess and tighten the gland cap screws according to the Bolting Torque Charts.
17.Lift the valve and place it so that the direction of the flow axis is horizontal (stem vertical).
18.Locate the dowel pins and place the stem housing on the body so the stem housing fits into the ball trunnion bearing and stem flats located in the ball slot.
19.Place and tighten the cap screws for the housing according to Bolting Torque Charts.
20.Fit both end connectors with seats to the body and tighten the nuts according to the Bolting Torque Charts.
21.Fit the gasket (stem) in the stem housing recess.
22.Locate the dowel pins, place the ISO mounting flange on the stem housing and tighten the cap screws.
23.Fit the stem key in the stem key way.
24.For lever-operated valves, place the hand lever on the stem and tighten the cap screw. For gear-operated or actuated valves, place the coupling on the stem, place the bracket to the ISO mounting flange, fit the studs and tighten the nuts. Place the gear operator or actuator on the coupling and the bracket, fit the studs and tighten the nuts.
25.Where applicable, fit the sealant injection fittings [(stem) and (seat)] and drain/vent plugs.
26.Rotate the ball slowly back and forth to a full quarterturn. This will allow the seat to assume its permanent position and shape against the ball and body. A fast turning motion may damage the seat before it has a chance to form a proper seal.
How to Maintain Trunnion Ball Valve
Look for signs of gasket leakage through the body/end connector joint and body/stem housing joint. If necessary, retorque the nuts/bolts according to the Bolting Torque Chart.
If possible, stroke the valve and check for smooth, full stroke operation. Unsteady stem movement may indicate an internal problem.
Ensure all brackets, gear, and actuator bolting are securely fastened.
Periodically flush the sealant ports with suitable valve cleaner to flush debris from the sealant system.
Cavity flushing is recommended for preventing accumulation of dirt/debris in the body cavity. Supply compatible fluid into the vent port and flush through the drain port provided at the bottom of the valve.
How do Trunnion Ball Valves Work?
Trunnion ball valve manufacturer designs their trunnion ball valve to work in a way similar to a floating ball valve. The working principle of a trunnion ball valve involves rotating the ball to control fluid or gas flow.
When the actuator sends a signal to the stem, it rotates the ball by 90 degrees, opening or closing the valve. The seat ensures that the ball stays in place during rotation. The injection system acts as a partial seal to prevent leakage when it occurs.
To start the oil flow in a trunnion ball valve, the actuator on the valve is rotated 90 degrees, usually clockwise. The actuator is connected to the valve stem, which is linked to the ball.
The rotation of the actuator moves the stem and the ball connected to it. This will result in an unrestricted flow of the substance in the pipe, and reduced pressure in the pipeline. This will restrict flow of the substances in the pipeline.
Product specifications
The first and foremost thing to consider is defining certain criteria that enable informed supplier selection. For instance, knowing the fluids involved can narrow the material specification and type of trunnion ball valves required. Additionally, knowing its applications can determine the configuration and specification of a suitable ball valve.
Temperature and pressure ratings
Accurately describing the minimum and maximum temperature and pressure is essential to choosing which type of ball valve would suit. Ultimately, it would narrow down the companies that supply those ball valves and make your choosing process straightforward. It is important to understand that the ball valve material and sealing degree can play an important role in adapting to the operational environment.
Cost and bulk orders
Remember that custom trunnion ball valve manufacturers may demand more time than those who sell standard pre-made ones.
Certifications
Understanding the necessary certifications can help determine the credibility and integrity of the supplier. It can be said with confidence that those suppliers with certifications ensure the minimum standards required in a trunnion ball valves manufacturing setting with reasonable costs. Certain standards to look for are API 6D, API 598, NEMA, ANSI, and NSF.
Lead time
Lead time can be crucial when considering the right supplier. While longer lead times can be beneficial, it is not always a good thing to have longer durations of waiting periods when dealing with highly dangerous material.
Support
The last thing to consider, and the most crucial factor, is to know if the supplier is actively engaged with customers regarding satisfaction, specifications, requirements, and feedback.
Are Trunnion Ball Valves Bidirectional?
Yes, trunnion ball valves are truly bidirectional. In this type of valve, the medium flows in both directions. The trunnion ball valve stem is rigidly fixed in place, holding the ball securely in place. In addition, it has spring-loaded seats that prevent the ball from floating downstream. The spring-loaded seat mechanism makes the valve leak-proof as the ball wears out. It's a good choice for high-volume petrochemical pipelines or gas lines. The trunnion stem and trunnion-mount ball valves are also a good choice for corrosive environments, including nuclear power plants.
Trunnion ball valves have a spherical stem and body. The ball's spherical surface is identical to the diameter of the stem. Because of this, the ball won't move upstream or downstream. This means that the seals are bidirectional, and the valve can handle high pressure and temperatures. And because of the trunnion's unique design, it can be used in multiple applications.
Our Factory
Group has 5 subsidiary corporations, located in Anyang, Tianjin, Hongkong and Singapore countries and districts. Headquarters is in hometown of oracle in Henan province, location of world cultural heritage "Yin Ruin", Anyang city, one of eight ancient capitals of China.
Our Certificate
FAQ
Hot Tags: trunnion ball valve, China trunnion ball valve manufacturers, suppliers, factory, ball valve optical couplings, cast steel trunnion ball valve, ball valve isolation valves, ball valve throttle valves, Pneumatic Actuated Ball Valve, ball top valve