Ball Valves

    » Trunnion Ball Valve

    » Floating Ball Valve

    Gate Valves

    » Cast Steel Gate Valve

    » Forged Steel Gate Valve

    Globe Valves

    » Cast Steel Globe Valve

    » Forged Steel Globe Valve

    Check Valves

    » Cast Steel Swing Check

    » Forged Steel Swing Check

    » Wafer Check Valve

Ball ValvesA ball valve is a valve that opens by the turn of a handle, gearbox or other actuation method attached to a ball, the part of the valve which controls the flow through it. The ball has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle or lever will be inline with the port position letting you "see" the valve's position. Position indicators will be applied to a gearbox or actuator as required. The ball valves, along with the butterfly valve and plug valve, are part of the family calledquarter turn valves. Ball valves are durable and usually work to achieve perfect shutoff even after years of disuse. They are therefore an excellent choice for shutoff applications. There are two type of ball valves based on the ball type, floating ball valves and trunnion mounted ball valves. Depending on the bore size of the ball itself, ball valves are designated as full port ball valves and reduced port ball valves. A full port or more commonly known full bore ball valve has an over-sized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted but the valve is larger and more expensive so this is only used where free flow is required, for example in pipelines which require pigging. In reduced port or more commonly known reduced bore ball valves, flow through the valve is one pipe size smaller than the valve's outlet size resulting in flow area being smaller than pipe. As the flow discharge remains constant and is equal to area of flow (A) times velocity (V), A1V1 = A2V2 the velocity increases with reduced area of flow. FBV ball valves designs include two piece split body, three piece split and welded ball valves. Design FeaturesReliable Stem SealThe blow out proof design for the stem assures that even if the pressure in the body cavity has risen accidentally and the packing flange breaks, the stem cannot be blown out by the medium. The stem features a backseat, assembled from within the body. The sealing force against the backseat gets higher as the medium pressure becomes higher. Therefore, a reliable stem seal can be assured under variable medium pressures. The stem cannot be removed during service. V type packing material has been employed to effectively transform the pushing force of the gland flange and the medium pressure into a sealing force against the stem. Based on customer requirements, a live loaded gland flange can be ordered for low emissions valves using a set of Belleville springs installed on each gland stud to provide a continuous compressive force on the gland, which guarantees permanent load retention for the stem packing to avoid fugitive emissions. Blowout Proof StemBlow-out proof structure is designed to avoid stem blow-out due to accidental medium pressure rise. The stem is positioned by screwed up-end cap. 

 Locking MechanismTo prevent unauthorized operation, the fully opened or closed position of the valve can be locked, especially useful when the valves are mounted outdoors or when valves may be opened or closed by unauthorized persons. A lockable hole on the pad is a standard feature.

 Mounting Bracket ProvidedThe mounting pad is a standard feature for easy installation of worm gear, pneumatic or electric operators. 

Trunnion Ball ValveThe ball on a trunnion ball valve does not move with medium pressure. Trunnion ball valves have floating seats. This valve uses pressure actuated seats with locked-in non-metallic face seals. To assure tight sealing at low pressures, special springs force the seats against the ball. At higher pressures, the upstream seat is forced against the ball by the pressure working across the differential between the area of the seat insert and the seat O-Ring; the higher the pressure, the tighter the seal. Sealant Injection DeviceTrunnion mounted ball valves are provided with devices, which are on both the stem and the seat of the valves DN 150 (NPS6) and larger and in the body cavity for valves less than DN 125. When the stem o-ring or the body seating ring is damaged, the medium leakage between the body and stem can be prevented by injecting sealant through the device. 

 Double Block and BleedThe pressure actuated seats and bleed fittings allow double block and bleed operation. When used for block and bleed, this feature permits the valve to take the place of two valves. It also allows the operator to check up and downstream sealing by bleeding off the body pressure. Anti-static DesignThe ball of the trunnion ball valve is in close contact with the trunnion, adjusting cushion, and trunnion end cap, thus providing a passage for static electricity to escape the confines of the valve. Fire Safe DesignIn case of fire, non-fireproof material for packing and seat will be burnt-out and considerable medium leakage may possibly cause the fire to spread. FBV uses metal to metal or graphite seals as an auxiliary safeguard to prevent medium leakage in cases of fire as shown in figures. The fire safe design confirms to the requirements of API607, API 6FA, BS 6755 and JB/T 6899.

Floating Ball ValveA floating ball valve is a valve with its ball floating (not fixed by a trunnion) inside the valve body; it drifts toward to the downstream side and tightly pushes against the seat under the medium pressure to ensure a reliable seal. The floating ball valve is a simple design with good sealing performance relying on the seat material to withstand the workload as the sealing pressure is barred by the seat ring. Floating ball valves are mainly used in low to mid level pressure applications. FBV manufactures the floating ball valve class 150 to class 600. Design FeaturesReliable Seat Seal The design element of the double-beveled sealing ring has been adopted to reduce the friction between the ball and the sealing ring achieving lower operation torque. When the medium pressure is low, the ball has less surface area contacting the sealing rings, which introduces higher sealing pressure to ensure the sealing reliability. When the medium pressure gets higher, the contacting area between ball and sealing ring increases accordingly. Larger contact area reduces the sealing pressure to avoid the deformation of sealing ring. Fire Safe DesignIn case of fire, non-fireproof material for packing and seat will be burnt-out and considerable medium leakage may possibly cause the fire to spread. FBV adopted metal to metal seals as an auxiliary safeguard to prevent medium leakage in cases of fire as shown in figures. The fire safe design confirms to the requirements of API607, API 6FA, BS 6755 and JB/T6899.

 Reliable Stem SealThe blow out proof design for the stem assures that even if the pressure in the body cavity has risen accidentally and the packing flange breaks, the stem cannot be blown out by the medium. The stem features a backseat, assembled from within the body. The sealing force against the backseat gets higher as the medium pressure becomes higher. Therefore, a reliable stem seal can be assured under variable medium pressures. The stem cannot be removed during service. V type packing material has been employed to effectively transform the pushing force of the gland flange and the medium pressure into a sealing force against the stem. Based on customer requirements, a live loaded gland flange can be ordered for low emissions valves using a set of Belleville springs installed on each gland stud to provide a continuous compressive force on the gland, which guarantees permanent load retention for the stem packing to avoid fugitive emissions Antistatic FeatureTo prevent electrostatic charges from building up within the valve, an antistatic device is placed between the ball and the stem or between the stem and the valve body. Locking MechanismTo prevent unauthorized operation, the fully opened or closed position of the valve can be locked, especially useful when the valves are mounted outdoors or when valves may be opened or closed by unauthorized persons. A lockable hole on the pad is a standard feature. Mounting Pad ProvidedThe mounting pad is a standard feature for easy installation of worm gear, pneumatic or electric operators. 

Gate ValvesA gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar. The gate faces can form a wedge shape or they can be parallel. Typical gate valves should never be used for regulating flow, unless they are specifically designed for that purpose. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening. This means that flow rate does not change evenly with stem travel. Also, a partially open gate disk tends to vibrate from the fluid flow. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing disk and seat wear and eventual leakage if used to regulate flow. Typical gate valves are designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss. Disc DesignSolid and Flexible Wedge StemGate valves are characterized as having either a rising or a non-rising stem. Rising stems provide a visual indication of valve position. Non-rising stems are used where vertical space is limited or underground. BonnetBonnets provide a leak proof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnets are the simplest design, offering a durable, pressure-tight seal. Union bonnets are suitable for applications requiring frequent inspection and cleaning. They also give the body added strength. Bolted bonnets are used for larger valves and higher pressure applications.Another type of bonnet construction in a gate valve is a pressure seal bonnet. This construction is adopted for valves for high pressure service, typically in excess of 15 MPa (2250 psi). The unique feature about the pressure seal bonnet is that the body bonnet joint seals improve as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint. Body-Bonnet GasketCarbon steel or stainless steel + flexible graphite combined gasket is used for Class150 gate valve; stainless steel + flexible graphite spiral wound gasket for Class 300 gate valve; stainless steel + flexible graphite spiral wound gasket for Class 600 gate valve, and ring type joint gasket is optional for Class 600 gate valve; ring type joint gasket is used for Class 900 gate valve; pressurized seal design is used for Class1500 to Class 2500 gate valve. OperationHand wheel or gearbox operator are usually applied, if required, chain wheel is available. Top flange dimension according to ISO 5211 is available for valves to be actuated. Belleville Spring Loaded PackingIf required, Belleville spring loaded packing can be applied to enhance the durability, reduce fugitive emissions and increase reliability of the packing seal. Packing SealMolded flexible graphite is normally used for packing material. PTFE or combined packing material can be also adopted if required. The internal surface of the stuffing box, of which area contacts the packing, is fine finished (Ra 3.2μm). The stem surface, contacting the packing, should be rolled and pressed after being precisely machined, so as to reach to high finish and compactness (Ra 0.8μm) and to ensure the reliable tightness of the stem area. Back Seat All FBV gate valves have a back seating design. In most cases, the carbon steel gate valve is fitted with a renewable back seat while for stainless steel gate valves, the back seat is machined directly in the bonnet or is machined after welding. When the gate valve is at fully open position, the sealing of the back seat is very reliable. However, according to API 600, the packing shall not be added or changed under line pressure. SeatFor carbon steel gate valves, the seat material is usually forged steel. The sealing surface of the seat is overlay welded with hard alloy specified by the customer. Renewable threaded-in seat rings are used for gate valves NPS≤10, and welded-on seat rings are optional and can be used if required. Welded-on seats are used for carbon steel gate valves NPS ≤10. For Stainless steel gate valve, the seat is integral or hard alloy welded integrally to the body. Threaded-in seat ring or welded-on seat is also optional for stainless steel gate valves. StemThe stem is of one-piece wrought material, welding fabricated is not permitted for FBV valves. The connection of the stem to the disc is “T” type. The strength of the connecting area is higher than that of the T threaded part of the stem. The strength test of the area conforms to API 591.Stem NutUsually, the stem nut is made of copper alloy or ASTM A439 D2. For large sized gate valves (NPS 10 for Class 150, NPS 8 for Class 300, NPS 6 for Class 600, NPS 5 for Class 900), a roller bearing is fitted underside of the stem nut in order to minimize the opening and closing torque of the gate valve.

Cast Steel Gate ValveNormative referenceAPI 600 Bolted Bonnet Steel Gate Valve for Petroleum and Natural Gas IndustriesBS 1414 Specification for Steel Wedge Gate Valves (Flanged and Butt-welding Ends) for the Petroleum, Petrochemical and Allied IndustriesASME B16.34 Valves Flanged, Threaded and Welding EndsASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24ASME B16.47 Series A Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch StandardASME B16.25 Buttwelding EndsASME B16.10 Face to Face and End to End Dimensions of ValvesMSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions Size availableNPS 2 to NPS 36 (DN50 to DN900) Pressure rating availableClass 150 to Class 2500

Forged Steel Gate ValveNormative ReferenceAPI 602 Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas IndustriesBS 5352 Specification for Steel Wedge Gate, Globe and Check Valves 50 mm and Smaller for the Petroleum, Petrochemical and Allied IndustriesASME B16.34 Valves Flanged, Threaded and Welding EndsASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24ASME B16.25 Buttwelding EndsASME B16.10 Face to Face and End to End Dimensions of ValvesASME B16.10 Face to Face and End to End Dimensions of ValvesASME B1.20.1 Pipe Threads, General Purpose (inch)ASME B16.11 Forged Steel Fittings, Socket-Welding and ThreadedMSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions Size availableNPS 1/2 to NPS 4 (DN15 to DN100) Pressure rating available Class 150 to Class 2500

Globe ValvesA globe valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body. Globe Valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle. This has an opening that forms a seat onto which a movable plug can be screwed in to close (or shut) the valve. The plug is also called a disc. In globe valves, the plug is connected to a stem which is operated by screw action in manual valves. Typically, automated valves use sliding stems. Automated globe valves have a smooth stem rather than threaded and are opened and closed by an actuator assembly. When a globe valve is manually operated, the stem is turned by a hand wheel. Globe valves are used for applications requiring throttling and frequent operation. For example, globe valves or valves with a similar mechanism may be used as sampling valves, which are normally shut except when liquid samples are being taken. Since the baffle restricts flow, they're not recommended where full, unobstructed flow is required. Body-Bonnet ConnectionThe body and bonnet of Class 150 to Class 900 valves are usually connected with studs and nuts. And the body and bonnet of Class 1500 to Class 2500 valve design usually utilizes a pressure seal bonnet. Body-Bonnet GasketStainless steel + flexible graphite wounded gasket is used for Class150 and Class 300 globe valve. Stainless steel + flexible graphite wounded gasket is used for Class 600, and ring type joint gasket is optional. Ring joint gasket is used for Class 900 globe valve. Pressure seal design is used for Class 1500 to Class 2500 globe valve.  OperationHand wheel and gearbox operation are applied for globe valve. Chain wheel and electric is available if required. Packing Seal Molded flexible graphite is used for packing material. PTFE or combined packing material can be applied if required. The internal surface of the stuffing box, of which area is contacted with the packing, is highly finished (Ra 3.2μm). The stem surface, contacting with the packing, is rolled and pressed after being precisely machined, so as to reach a high finish and compactness (Ra 0.8μm) and ensures a reliable tightness of the stem area. Belleville Spring Loaded PackingIf required, Belleville spring loaded packing can be applied to enhance the durability, reduce fugitive emissions and increase reliability of the packing seal. Back SeatAll our globe valves have a back seating design. In most cases, the carbon steel globe valve is fitted with a renewable back seat.For stainless steel globe valve, the back seat is machined directly in the bonnet or machined after welding. When the globe valve is in fully open position, the sealing of the back seat can be very reliable. However, as per the requirement of design standards, it is not advisable to add or change packing by means of back seating when the valve is under line pressure.  SeatFor carbon steel globe valves, the seat material is usually forged steel. The sealing surface of the seat is overlay welded with hard alloy specified by customer. Renewable threaded-in seats are used for globe valves NPS≤10, and welded-on seats are optional. Welded-on seats are used for NPS ≥ 12 carbon steel globe valves. For stainless steel globe valves, integral seat are usually adopted or hard alloy welded integrally. Threaded-in or welded on seats are optional for stainless steel globe valves. StemThe stem is one-piece forged steel. The minimum diameter of the stem shall be as per the standard requirements. Stem NutUsually, the stem nut is made of copper alloy. It can be made of ASTM A439 D2 if required. For large sized globe valves, a roller bearing is fitted on both sides of the stem nut in order to minimize the opening and closing torque of the globe valve. 

Cast Steel Globe ValveNormative referenceBS 1873 Steel Globe and Globe Stop and Check Valves (Flanged and Butt- Welding Ends) for the Petroleum, Petrochemical and Allied IndustriesASME B16.34 Valves Flanged, Threaded and Welding EndsASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24ASME B16.47 Series A Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch StandardASME B16.25 Buttwelding EndsASME B16.10 Face to Face and End to End Dimensions of ValvesMSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions Size availableNPS 2 to NPS 36 (DN50 to DN900) Pressure rating availableClass 150 to Class 2500

Forged Steel Gate ValveNormative ReferenceAPI 602 Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas IndustriesBS 5352 Specification for Steel Wedge Gate, Globe and Check Valves 50 mm and Smaller for the Petroleum, Petrochemical and Allied IndustriesASME B16.34 Valves Flanged, Threaded and Welding EndsASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24ASME B16.25 Buttwelding EndsASME B16.10 Face to Face and End to End Dimensions of ValvesASME B16.10 Face to Face and End to End Dimensions of ValvesASME B1.20.1 Pipe Threads, General Purpose (inch)ASME B16.11 Forged Steel Fittings, Socket-Welding and ThreadedMSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions Size availableNPS 1/2 to NPS 4 (DN15 to DN100) Pressure rating available Class 150 to Class 2500

Check ValvesA check valve allows fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. Design FeaturesSeatFor carbon steel check valves, the seat material is usually forged steel. The sealing surface of the seats is spray welded with hard alloy specified by the customer. Renewable threaded seats are used for NPS≤10 check valves, and welded-on seats are optional. Welded-on seats are used for NPS≥12 carbon steel gate valves. For stainless steel check valves, an integral seat is usually utilized, i.e. by welding hard alloy directly within body cavity. Threaded-in or welded-on seats are also optional for stainless steel check valves, if required. Body-Cover Gasket Stainless steel + flexible graphite wounded gaskets are used for Class 150 and Class 300 check valves; stainless steel flexible graphite wounded gaskets are used for Class 600 check valves, a ring type joint gasket is used for Class 900 check valves; a pressure seal design is used for Class 1500 and Class 2500 check valves Body-Cover ConnectionThe body and bonnet of Class150 to Class 900 check valves are usually connected by with studs and nuts. And the body and bonnet of Class 1500 to Class 2500 check valves usually utilize a pressure seal design.

Cast Steel Swing CheckA swing check valve consists of a flap or disc which hangs down in the flow path. With flow in the forwards direction, the pressure of the fluid forces the disc to swing upwards, allowing flow through the valve. Reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve. Normative referenceAPI 6D Pipeline ValvesBS 1868 Specification for Steel Check Valves (Flanged and Butt-Welding Ends) For The Petroleum, Petrochemical and Allied IndustriesASME B16.34 Valves Flanged, Threaded and Welding EndsASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24ASME B16.47 Series A Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard ASME B16.25 Buttwelding EndsASME B16.10 Face to Face and End to End Dimensions of ValvesMSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions Size availableNPS 2 to NPS 24 (DN50 to DN600)  Pressure rating availableClass 150 to Class 2500

Forged Steel Swing CheckA swing check valve consists of a flap or disc which hangs down in the flow path. With flow in the forwards direction, the pressure of the fluid forces the disc to swing upwards, allowing flow through the valve. Reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve. Normative referenceAPI 602 Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas IndustriesBS 5352 Specification for Steel Wedge Gate, Globe and Check Valves 50 mm and Smaller for the Petroleum, Petrochemical and Allied IndustriesASME B16.34 Valves Flanged, Threaded and Welding EndsASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24ASME B16.25 Buttwelding EndsASME B16.10 Face to Face and End to End Dimensions of ValvesASME B1.20.1 Pipe Threads, General Purpose (inch)

ASME B16.11 Forged Steel Fittings, Socket-Welding and ThreadedMSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions Size availableNPS 1/2 to NPS 4 (DN15 to DN100) Pressure rating availableClass 150 to Class 2500

Wafer Check ValveWafer check valves, also known as dual-plate check valves, have two spring loaded half-moon shaped discs that rotate about their shaft. The disc plates are kept shut by a torsion spring. When fluid flows in a forward direction, the pressure of the fluid causes the disc plates to swing open, allowing flow. The check valve is closed by the spring as soon as flow ceases, before any reverse flow can occur. Normative referenceAPI 6D Pipeline ValvesAPI 594 Check Valves: Flanged, Lug, Wafer and Butt-WeldingASME B16.34 Valves Flanged, Threaded and Welding EndsASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24ASME B16.47 Series A Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch StandardASME B16.25 Buttwelding EndsASME B16.10 Face to Face and End to End Dimensions of ValvesMSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions Size availableNPS 2 to NPS 24 (DN50 to DN600) Pressure rating availableClass 150 to Class 900

Wafer Check Valve Class 900