Your position : Home > News > Industry News

DIN F4 resilient seated gate valve DN450-1200 Resilient Seated Gate Valve DIN F5 resilient seated gate valve Socket connection soft seal gate valve Underground cap soft seal gate valve BS5163 rising stem soft seal gate valve Hard seal gate valve API slab Gate Valve Stainless steel flange gate valve Wafer knife gate valve Pneumatic gate valve Soft seal gate valve Extension stem gate valve UL/FM fire protection groove ends gate valve Rising stem forged steel gate valve carbon steel gate valve Stainless steel threaded gate valve DIN soft seal gate valve ANSI soft sealing gate valve 200PSI Cast iron gate valve BS resilient seated gate valve

Butterfly valve

D643H Triple Eccentric Butterfly Valve D343H Hard seal butterfly valve Multi standard EPDM seated butterfly valve Single flange butterfly valve DN2000 Double eccentric butterfly valve Flange butterfly valve Lug butterfly valve Wafer butterfly valve with handle Worm gear operated butterfly valve Wafer lined fluorine butterfly valve Stainless steel wafer butterfly valve Stainless steel flanged butterfly valve Three eccentric flange butterfly valve Pneumatic flanged butterfly valve Pneumatic wafer butterfly valve Triple eccentric butterfly valve wafer type Wafer butterfly valve ULC approved Inflatable seat butterfly valve High performance butterfly valve Grooved end butterfly valve Electric soft seal butterfly valve Flange fluorine lined butterfly valve Handle aluminum butterfly valve Worm Gear Aluminum Butterfly Valve Full PTFE lined butterfly valve wafer type One stem no-pin wafer butterfly valve Multi standard aluminum stem butterfly valve Stainless Steel wafer Butterfly Valve Aluminium handle operated lug butterfly valve Lever Operated Flange Butterfly Valve Butterfly valve stem Butterfly valve disc Butterfly valve seat

Ball valve

Flanged three-way ball valve Fully welded ball valve Natural gas ball valve High platform flange ball valve 1 PC ball valve Fixed ball valve PTFE seat flanged ball valve Metal seat ball valve API 6D ball valve 3 Piece ball valve Full Bore 3 way ball valve L-Port 3 Way T-Port ball valve 2PC Ball valve female thread stainless steel

Globe Valve

API Carbon Steel Globe Valve Bellows Globe Valve Stainless steel flange globe valve Stainless steel thread S type globe valve Stainless steel thread B type globe valve Cast Steel Globe Valve Piston Globe Valve WCB Carbon Steel Globe Check Valve electric motorized control stainless steel SS316 globe valve Brass Globe Valve Cryogenic Globe valve HT200 Globe Valve Threaded Stainless Steel Globe Valve GG25 Globe Valve ANSI API Cast Steel And Stainless Steel Globe valve

Check valve

Rubber seal check valve DN800 Slow closing check valve DN800 Rubber Disc Check Valve Butterfly Buffering Check Valve check valve with counter weight Silent Check Valve WCB Swing check valve Swing Check Valve Single Chip Check Valve H74W Stainless Steel Wafer Check Valve Swing Start Check Valve Foot check valve API Swing Check Valve DIN Flange check valve Single plate check valve Lifting Check Valve Bottom Valve Hammer Diminish Noises Check Valve Wafer Check Valve Wafer dual plate check valve

Control valve

Cage Guided Sleeve Globe Control Valve DN1000 Piston Flow Regulating Valve Pneumatic Flanged Butterfly Valve Pneumatic Wafer Butterfly Valve Angle Seat Valve Pneumatic gate valve Electric three-way control valve Electric sleeve control valve

Water Meter

Vertical Type Water Meters Stainless steel threaded water meter Piston water meter Plastic water meter More flow rotor dry water meter spiral vane flange water meter CI wotlman water meter with pulse output LXCLG(R) Vertical removable element woltman cold (hot) water meter Single flow rotor dry water meter Prepaid Token Water Meter Electromagnetic flowmeter Rotary Piston Liquid Sealed Water Meter Rotary Piston Liquid Sealed Water Meter

Air valve

Double ball exhaust valve Doubleair Air Valve Saudi Doubleair Air Valve Southeast Asia Doubleair Air Valve South America Double Air Valve Threaded Air Valve Single Air Valve Triple Functions Air Valve Automatic Air Release Valve Automatic release valve Automatic exhaust valve Composite Exhaust Air Valve Brass exhaust valve Double Ball Air Valve

Copper valve

4" copper gate valve copper electric solenoid valve brass ball valve Brass exhaust valve Brass Globe Valve Copper Globe Valve Copper Thread Gate Valve Copper Ball Valve （Thread）Copper Strainer

Pipe Repair & Coupling

Flexible Multi-Function Pipe Coupling ZFJ-S SS Semi-Circle Pipe Repair Clamp SJW-H Ductile Iron Band Repair Clamp Stainless Steel Band Repair Clamp Double-Section Pipe Repair Coupling Folding Type Pipe Repair Single-Section Multi-Function Pipe Coupling MF-S Gear-Ring Type Multi-Function Pipe Coupling GR-S ZBW Damping Corrugated Hose

Ductile iron(DI) pipe fittings

Double flanged reducer Blank flange Angle branch tee All flange tee Flange cross Double flange bend Flange elbow 45° 90°Double socket taper /reducer Cast Iron Strainer

Strainer

Forged Steel Y Strainer DIN standard Industrial Y Type Strainer for Pump Copper Strainer BS Y Strainer Flange Y-Type Strainer Cast Iron Strainer Threaded Strainer German Standard Y Type Filter ANSI “Y” Strainer

Dismantling Joint

VSSJAFC(CC2F) Detachable Flange Transmission Joint VSSJA-2(B2F) Double Flange Limited Expansion Joint VSSJA-1(BF) Single Flange Limited Expansion Joint VSSJA(AF) Flange Loose Expansion Joint JGD-B Threaded Rubber Joint ZBW Damping Corrugated Hose KXT-S Flexible Dual-Spherical Rubber Joint KXT Rubber Soft Joint Flange Adaptor

hot products

Send Message

Ball valve selection and installation

2023-12-05

Ball valve is one of the commonly used valves in production and life; it is mainly used in food, chemical, petroleum, electric power and other industries. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to rotate 90 degrees and a small rotational torque to close tightly.

Ball valve application scope:

Valve body material: WCB, 304, 316

Operating temperature: <=150 ℃ (optimal operating temperature of fluorine-lined soft seal ball valve)

Applicable media: water, oil, nitric acid, acetic acid

Note: In actual procurement, the appropriate valve material is selected based on specific working condition information. (Under high temperature conditions, a hard-sealed ball valve needs to be selected)

Advantages of ball valves:

① The fluid resistance is small, and its resistance coefficient is equal to that of a pipe section of the same length.

② Simple structure, small size and light weight.

③ Tight and reliable. At present, plastic is widely used as the sealing surface material of ball valves, which has good sealing performance and has also been widely used in vacuum systems.

④ Easy to operate, quick to open and close, just rotate 90° from fully open to fully closed, convenient for long-distance control.

⑤ Easy to maintain, the ball valve has a simple structure, the sealing ring is generally movable, and it is easy to disassemble and replace.

⑥ When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes, it will not cause erosion of the valve sealing surface.

⑦ It has a wide range of applications, with diameters ranging from a few millimeters to several meters, and can be applied from high vacuum to high pressure. When the ball rotates 90 degrees, it should all present a spherical surface at the inlet and outlet, thus cutting off the flow.

Structural features of ball valve:

① Opening and closing without friction. This function completely solves the problem of traditional valves affecting sealing due to mutual friction between sealing surfaces.

② Top-mounted structure. Valves installed on pipelines can be directly inspected and repaired online, which can effectively reduce device shutdowns and reduce costs.

③ Single valve seat design. It eliminates the problem of abnormal pressure increase of the medium in the valve cavity that affects the safety of use.

④ Low torque design. The specially designed valve stem only needs a small handle to open and close the valve easily.

⑤ Wedge sealing structure. The valve relies on the mechanical force provided by the valve stem to press the ball wedge onto the valve seat to seal, so that the sealing performance of the valve is not affected by changes in pipeline pressure difference, and the sealing performance is reliably guaranteed under various working conditions.

⑥Self-cleaning structure of sealing surface. When the ball tilts away from the valve seat, the fluid in the pipeline passes 360° evenly along the ball sealing surface, which not only eliminates the local erosion of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface, achieving the purpose of self-cleaning.

Ball valve selection principles:

① For main oil and natural gas transmission lines that need to be cleaned and buried underground, ball valves with full-bore and fully welded structures should be selected; if they are buried on the ground, ball valves with full-bore welded connections or flange connections should be selected; For branch pipes, flange connections, welded connections, full-bore or reduced-bore ball valves are selected.

② For refined oil transportation pipelines and storage equipment, use flange-connected ball valves.

③ For city gas and natural gas pipelines, floating ball valves with flange connection and internal thread connection should be used.

④ For the oxygen pipeline system in the metallurgical system, fixed ball valves with flange connections should be used that have undergone strict degreasing treatment.

⑤ For piping systems and devices with low-temperature media, it is advisable to use low-temperature ball valves with a valve cover.

⑥ For the piping system of the catalytic cracking unit of the oil refining unit, a lift-rod ball valve can be used.

⑦ For devices and piping systems with corrosive media such as acids and alkalis in chemical systems, all-stainless steel ball valves made of austenitic stainless steel and with polytetrafluoroethylene as the valve seat sealing ring should be used.

⑧ For pipeline systems or devices with high-temperature media in metallurgical systems, power systems, petrochemical installations, and urban heating systems, metal-to-metal sealing ball valves can be used.

⑨ When flow adjustment is required, a worm gear-driven, pneumatic or electric regulating ball valve with a V-shaped opening can be used.

Analysis of common faults of ball valves

Fault 1: Media leakage

Analysis: ① The valve is not closed tightly ② The sealing gasket is damaged

Solution: ① Re-close the valve ② Replace with new one

Note: If the medium temperature is too high and the medium contains too many particles, the sealing gasket will be damaged.

Fault 2: The valve stem is not sensitive

Analysis: The bolts are too tight or the bolts have different tightness in different places.

Solution: Loosen the gland bolts and loosen the left and right nuts evenly. Be careful not to leak.

Fault 3: Leakage at the connection between the valve body and the pipeline

Analysis: The connection surface is uneven, there is dirt, and the sealing gasket is damaged.

Solution: Correct the connection surface, remove dirt, and replace the sealing gasket

Ball valve installation precautions

① Before installation, you should carefully check whether the valve logo, certificate, etc. meet the usage requirements. Those with driving devices should be installed correctly and standardizedly.

② Before installation, the valve should be in a closed state to prevent impurities from entering the valve and damaging the sealing surface.

③ During use, the valve should be regularly inspected, maintained and maintained at least once a year, and problems should be checked in a timely manner to avoid problems during use.

Pre : Why are fluorine-lined butterfly valves so popular?

Next : What working conditions are ball valves suitable for?