OverviewThe D71X Wafer-Type Centerline Butterfly Valve is a valve that controls the opening, closing, and regulation of fluid flow by rotating a disc-shaped butterfly plate around its fixed shaft (valve stem). The axis of the valve stem is located at the "centerline" position, where the sealing surface of the butterfly plate intersects with the centerline of the pipeline channel, ensuring symmetrical design on both sides of the butterfly plate. The valve features a wafer-type connection, meaning the valve body itself is flangeless and is clamped between two pipeline flanges using double-ended bolts. The sealing ring of the butterfly plate is typically made of elastic materials such as rubber and is directly embedded in the valve body or the inner ring of a pressure plate, achieving sealing by compressing the ring during butterfly plate rotation. The valve is operated manually, electrically, or pneumatically, driving the valve stem to rotate 90 degrees or less for rapid control of fluid flow, including on/off functions and flow regulation. D71X Wafer-Type Centerline Butterfly Valve

OverviewThe D371X Worm Gear Operated Wafer Butterfly Valve is a valve that controls pipeline fluid flow through the rotational movement of its disc. Featuring a wafer-type connection design, the valve body is directly clamped between pipeline flanges via bolts, resulting in a compact structure. The drive mechanism employs a worm gear assembly, where rotation of the handwheel drives the worm inside the gearbox, which in turn rotates the worm wheel and valve stem. This motion causes the disc mounted on the stem to turn within a 90° range, thereby regulating medium flow. The sealing surface of the disc is typically made of rubber or other elastic materials, forming a soft seal with the valve seat to ensure tightness in the closed position. The D371X butterfly valve operates with low effort and rapid opening/closing, making it widely used in water treatment, HVAC, fire protection, and industrial piping systems.Product Illustration of D371X Worm Gear Operated Wafer Butterfly Valve

OverviewThe D341X Gear-Operated Flanged Butterfly Valve is a valve designed with flanged connections, utilizing a worm gear mechanism to drive the disc through a 90° rotation for opening, closing, and flow regulation. The centerline design of the valve body ensures uniform contact between the disc sealing surface and the seat, achieving bidirectional sealing through the compression deformation of a rubber or elastic polymer disc seal ring (or seat seal ring). The gear-operated transmission device (commonly referred to as a gearbox) amplifies manual operating torque, enabling smooth operation even for large-diameter valves. It also features a self-locking function to maintain the disc securely at any opening position. This valve is widely used for fluid pipeline control in industries such as water treatment, HVAC, water supply and drainage, energy, and chemical processing.Product Illustration of D341X turbine flange butterfly valve

OverviewThe D371X-150LB American Standard Butterfly Valve is a wafer-type butterfly valve designed in accordance with the U.S. standard 150pound pressure rating. The valve controls fluid flow by rotating a disc 90° around the stem inside the valve body. Its centerline symmetrical design ensures uniform contact between the disc and seat. The disc sealing is typically achieved with rubber or elastic polymer materials, which form a bidirectional seal through compression deformation. This valve is widely used in industrial applications such as petroleum, chemical, and power industries, and is particularly suitable for fluid control in pipeline systems conforming to American standards (ANSI/ASME).Product Drawing ofD371X-150LB American Standard Lug Type Butterfly Valve

OverviewD341F46 cast steel flange lined fluorine butterfly valve is a valve that opens, closes, and regulates fluid channels by rotating a disc-shaped butterfly plate around its fixed shaft (valve stem). The axis of its valve stem deviates from the center of the butterfly plate sealing surface, and adopts a "single eccentricity" or more complex structural design, with asymmetric sides on both sides of the butterfly plate. The valve adopts a flange connection, which means that the valve body has standard flanges at both ends and is directly fastened to the pipeline flange through bolts. The surface of the butterfly plate and the inner cavity of the valve body are lined with fluoroplastic (such as F46, also known as perfluoroethylene propylene FEP) as the sealing surface and anti-corrosion layer, and the butterfly plate is used to rotate and press the fluorine lined valve seat to achieve sealing. This valve is driven by manual, electric, or pneumatic devices to rotate the valve stem by 90 ° or less, achieving reliable on/off and flow control for highly corrosive and other harsh media fluids.D341F46 cast steel flange lined fluorine butterfly valve product diagram

OverviewThe D71X lug-type fire butterfly valve is a valve that opens, closes, and regulates fluid flow by rotating a disc around its fixed shaft (stem). Its stem axis is also located at the "center line" where the center of the disc sealing surface intersects with the centerline of the pipeline passage, with the disc being symmetrical on both sides. The valve adopts a lug-type connection, meaning the valve body is designed with raised lugs containing threaded holes, allowing the valve to be secured between pipeline flanges using single-end bolts, and it can also be used as a pipe-end valve. The disc sealing ring is typically made of elastic materials such as rubber, directly embedded in the inner groove of the valve body or retainer plate, achieving sealing by the disc rotating and compressing the sealing ring. The valve can be driven manually, electrically, or pneumatically to rotate the stem by 90° or less, enabling quick control of fluid on/off and flow regulation. It is particularly suitable for fire protection systems and pipeline conditions requiring independent disassembly and maintenance.D71X Lug Type Fire Butterfly Valve Product Drawing

OverviewThe D371X wafer type fire signal butterfly valve is a valve that opens, closes, or regulates pipeline fluid through the rotary motion of the disc, while integrating a signal feedback function. The valve adopts a wafer-type connection design, with the valve body directly clamped between pipeline flanges using bolts, offering a compact structure and light weight. Its transmission method is a worm gear mechanism, where the handwheel drives the worm inside the gearbox, which in turn drives the worm wheel and stem to rotate, causing the disc fixed on the stem to rotate within a 90° range, thereby controlling the medium flow. The disc sealing surface is typically made of rubber or other elastic materials, forming a soft seal with the valve seat to ensure tightness when closed. The valve is equipped with micro switches or signal devices integrated into the worm gearbox. When the disc reaches the fully open or fully closed position, it can output passive contact signals to achieve linkage alarm or status indication with the fire control center. The D371X wafer type fire signal butterfly valve is labor-saving to operate, quick to open and close, and is widely used in automatic sprinkler systems, fire hydrant systems, water treatment, and industrial pipeline systems. D371X Wafer Type Fire Signal Butterfly Valve Product Drawing

OverviewThe D341X flanged fire butterfly valve is a valve that uses flanged connections and a worm gear transmission mechanism to drive the disc in a 90° rotation for opening/closing and flow regulation. The valve body features a concentric or eccentric design (typically concentric), ensuring uniform contact between the disc sealing surface and the valve seat. The integrally coated or lined rubber valve seat (made of aging-resistant elastic materials such as EPDM, NBR, etc.) deforms under pressure to form reliable bidirectional sealing. The worm gear transmission device (worm gearbox) amplifies the manual operating torque, enabling easy opening and closing of large-diameter valves, and provides a self-locking function to stably maintain the disc at any opening position. Due to its compact structure, low flow resistance, and reliable sealing, this valve is widely used for fluid pipeline control in fire protection water systems, water treatment, water supply and drainage, HVAC, and other applications.D341X Flanged Fire Butterfly Valve Product Drawing

OverviewThe D11X internal thread butterfly valve operates by rotating the disc around a fixed axis to open, close, and regulate fluid flow. It adopts a concentric symmetric structure, with the valve stem positioned at the intersection of the disc and the pipeline center. The connection type is grooved, with standard grooves machined at both ends of the valve body. The valve is secured using clamps, requiring no welding or flanges, enabling fast installation and easy alignment. The sealing ring is typically made of elastic materials such as EPDM, which is vulcanized or embedded onto the disc or valve body. Zero leakage is achieved through rotational compression and deformation of the seal. The valve is operated by a handle or worm gear, rotating 90° to quickly control non-corrosive media such as water and firefighting foam. It is widely used in fire protection, water supply and drainage, air conditioning, and industrial cooling water pipelines. Product Image of D11X Internal Thread Butterfly Valve

OverviewThe D81X manual grooved soft-sealing butterfly valve is a valve that opens, closes, and regulates fluid flow by rotating a disc-shaped butterfly plate around its fixed axis (valve stem). Its valve stem axis is located at the centerline position where the sealing surface center of the butterfly plate intersects with the centerline of the pipeline channel, with the butterfly plate being symmetrical on both sides. The valve adopts a grooved connection method, meaning there are no flanges at both ends of the valve body. Instead, standard grooves are machined on the outer circumference of the valve body. The valve is rigidly locked to the grooved pipeline using matching clamps, requiring no welding or flange bolts, offering fast installation and easy alignment. The butterfly plate sealing ring is typically made of elastic materials such as EPDM, which is directly vulcanized or embedded onto the butterfly plate or valve body. During opening and closing, the rotation of the butterfly plate compresses and deforms the sealing ring to achieve zero-leakage sealing. The valve is driven by a manual worm gear or handle to rotate the valve stem by 90 degrees or less, allowing rapid control of the flow of non-corrosive fluids such as water and firefighting foam concentrate. It is widely used in pipeline systems such as building fire protection, water supply and drainage, air conditioning circulating water, and industrial cooling water.D81X Manual Grooved Soft-sealing Butterfly Valve Product Image

OverviewThe D381X turbine grooved signal butterfly valve is a grooved-connected signal valve that adopts worm gear transmission. Its body is made of ductile iron, and the disc features a fully rubber-covered design. The valve is opened and closed by the worm gear reduction mechanism driving the stem to rotate 90°. A micro-switch type signal device is integrated into the valve. When the cam rotates with the worm gear to a preset position, it trips the contacts on the signal device, thereby outputting an "ON" or "OFF" electrical signal to indicate and feed back the open/close status of the butterfly valve. The valve is mainly connected to pipelines by grooved clamps, requiring no welding during installation. It is particularly suitable for applications such as fire sprinkler systems where remote monitoring of valve status is required.Product Image of D381X Turbine Grooved Signal Butterfly Valve