Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

DRVZ Nozzle Check Valve
HC41X Muffler Check Valve
H12W Internal Thread Brass Lift Check Valve
H42W Vertical Check Valve
H71W Wafer Check Valve
H71H Lift Type Wafer Check Valve
GLH41W Axial Flow Check Valve
H41H Forged Steel Lift Check Valve
H61H Forged Steel Internal Thread Check Valve
H61Y Power Plant High-Temperature High-Pressure Welded Check Valve
H41W Lift Check Valve
H42F46 Fluorine-Lined Lift Check Valve
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Phone：+86（577）6730 7899
Mobile：+86 189 6779 6135
Fax：+86（577）6738 7099
Email：Yannie@kaiweixi.com
Address：No. 1, Linxia Road, Sanqiao Industrial Zone, Oubei Street, Yongjia County, Zhejiang Province，china
Website：https://www.kaiweixi.com

Lift Check Valve

Lift check valve is a type of valve that relies on the pressure of the fluid itself and the weight of the valve disc to achieve automatic opening and closing. Its core function is to prevent backflow when the medium flows unidirectionally in the pipeline. Its typical structure consists of a valve body, a valve cover, and a valve disc (shaped like a piston or disk) that moves up and down along the axis of the valve seat channel. When the medium flows in the forward direction, the fluid pressure lifts the valve disc and opens the valve; When the flow stops or the pressure decreases, the valve disc automatically falls back to the valve seat under the action of its own weight and medium back pressure, achieving a tight closure. Kaiweixi Valve mainly produces internal thread lift check valves, copper lift check valves, articulated check valves, noise reducing check valves, fluorine lined lift check valves, forged steel lift check valves, forged steel self sealing lift check valves and other lift check valves with compact structure, reliable sealing performance, and easy manufacturing and maintenance. However, their flow resistance is larger than that of rotary opening type, and the valve disc stroke is limited by the structure. Widely used in clean medium pipelines with small nominal sizes and low flow rates, commonly found in situations where strict prevention of medium backflow is required, such as water supply and drainage, boiler feedwater, and compressor outlets.

DRVZ Nozzle Check Valve

Model：
DRVZ-10Q/DRVZ-16Q/DRVZ-10P/DRVZ-16P/DRVZ-10/DRVZ-16
Specification：
DN40-DN350
Pressure：
PN10~16
Material：
Stainless Steel,cast iron,ductile iron

DRVZ Nozzle Check Valve OverviewThe DRVZ Nozzle check valve features a contour design that perfectly conforms to hydraulics, achieving a streamlined waterway. Its internal fluid guide design ensures minimal pressure loss. Installed at the pump outlet, this Nozzle check valve quickly closes before backflow occurs, preventing water hammer, water surge noise, and destructive impacts. It achieves the goals of quiet operation, backflow prevention, and equipment protection, and is widely used in water supply and drainage, fire protection, HVAC, and industrial systems.DRVZ Nozzle Check Valve Product Image

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HC41X Muffler Check Valve

Model：
HC41X-10Q/HC41X-16Q/HC41X-25Q
Specification：
DN40-DN600
Pressure：
PN10,PN16,PN25
Material：
Ductile iron、cast iron

HC41X Muffler Check Valve OverviewThe HC41X Muffler Check Valve is suitable for water supply, fire protection, HVAC, chemical, power plant, metallurgical, petrochemical and other systems. It can be installed at the water pump outlet to prevent backflow and water hammer damage to the system. It can be installed in any direction, but vertical installation is recommended.HC41X Muffler Check Valve Product Image

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H12W Internal Thread Brass Lift Check Valve

Model：
H12W-10T/H12W-16T/H12W-25T/H12W-40T
Specification：
DN15-50
Pressure：
PN10,PN16,PN25,PN40
Material：
brass

H12W Internal Thread Brass Lift Check Valve Overview The H12W Internal Thread Brass Lift Check Valve is a compact automatic valve designed with internal thread connections, utilizing the vertical lift motion of its disc to achieve unidirectional flow control. The valve body and main components are manufactured from forged brass, offering excellent corrosion resistance and versatility. Its operating principle relies on the pressure of forward-flowing media to lift the disc open. When the media flow stops or reverses, the disc rapidly returns to the seat under its own weight and reverse pressure, achieving automatic closure and effectively preventing media backflow. Specifically designed for pipelines requiring horizontal installation, this valve features a compact structure and is suitable for use in non-corrosive media systems such as water, oil, and air, with a nominal pressure rating up to PN16. It is commonly applied in building water supply and drainage systems, HVAC installations, and small household equipment. H12W Internal Thread Brass Lift Check Valve Product Image

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H42W Vertical Check Valve

Model：
H42W-16C/H42W-25P/H42W-40P/H42W-40R
Specification：
DN25-200
Pressure：
PN16,PN25,PN40
Material：
Carbon Steel, Stainless Steel

H42W Vertical Check Valve Overview The H42W Vertical Check Valve is an automatic valve specifically designed for vertical pipelines, featuring flanged connections and a lift-type structure. The valve body is typically constructed from cast steel or stainless steel, with the internal disc operating through vertical movement to achieve opening and closing.This valve must be installed on vertical pipelines where the medium flows upward from bottom to top. Its working principle relies on the upward flow pressure of the medium to overcome the disc's weight and spring force (if equipped) for opening. When the medium pressure drops or backflow occurs, the disc rapidly returns under its own weight and spring assistance to achieve closure, thereby preventing reverse flow of the medium.Designed specifically to address backflow prevention in vertical pipelines, it is widely used in vertical pipeline sections of building water supply systems, HVAC systems, industrial circulating water systems, and pump discharge lines, serving as a critical component to ensure unidirectional flow in the system.H42W Vertical Check Valve Product Image

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H71W Wafer Check Valve

Model：
H71W-PN40C/H71W-16C/H71W-25C/H71W-16P/H71W-25P/H71W-40P
Specification：
DN15-250
Pressure：
PN16,PN25,PN40
Material：
Carbon Steel, Stainless Steel

H71W Wafer Check Valve Overview The H71W Wafer Check Valve is a compact and versatile check valve that employs a wafer-type connection. Unlike flanged valves, its body does not incorporate flanges and is instead installed between two pipeline flanges using long bolts. The valve body is typically constructed from materials such as stainless steel, carbon steel, or cast iron, and features an internal single-disc or dual-disc swing-type design.The valve operates by swinging open under forward medium flow and automatically closing under the disc’s own weight, often assisted by a spring, when the medium stops or reverses direction, thereby preventing backflow.Known for its lightweight design, short face-to-face length, and cost-effectiveness, this valve is widely used in space-constrained pipeline systems such as water treatment, HVAC, industrial circulating water, and pump discharge lines. It is suitable for general media including water, oil, and air. H71W Wafer Check Valve Product Image

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H71H Lift Type Wafer Check Valve

Model：
H71H-10C/H71H-16C/H71H-25C/H71H-40C/H71H-10P/H71H-16P/H71H-25P/H71H-40P
Specification：
DN15-DN200
Pressure：
PN10-PN40
Material：
WCB、Stainless Steel

H71H Wafer-Type Lift Check Valve OverviewThe H71H wafer-type lift check valve is an energy-efficient check valve that adopts a single-disc lift-type design and operates automatically based on medium flow. It typically uses a wafer-type connection. The valve body is commonly made of stainless steel, cast steel, or ductile iron, with its internal single disc moving vertically along the centerline of the valve body. The valve can be installed horizontally or vertically. When the medium flows in the forward direction, it pushes the disc to open smoothly, providing an unobstructed flow path with low pressure loss. When the medium stops or flows in reverse, the disc quickly falls back and closes under the combined action of spring force and reverse medium pressure, ensuring reliable sealing and fast shut-off. This valve is specifically designed for pipeline systems with limited installation space and the need for quick closure. It is widely used in water supply and drainage, fire protection systems, HVAC, and industrial circulating water projects, serving as a simple, economical, and practical pipeline protection device.H71H Lift Type Wafer Check Valve Product Image

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GLH41W Axial Flow Check Valve

Model：
GLH41W-150LB/GLH41W-300LB/GLH41W-600LB/GLH41W-900LB/GLH41W-1500LB/GLH41W-2500LB
Specification：
2"-36"
Pressure：
CL150 - 2500LB
Material：
Carbon Steel,Stainless Steel, DuplexSS,Monel, AL-Bronze

OverviewThe axial flow check valve is an energy-saving check valve featuring a streamlined disc design that moves linearly along the pipeline axis for automatic opening and closing. It typically adopts a flanged or wafer connection. The valve body is mainly made of cast steel, stainless steel or ductile iron, with its internal disc performing axial reciprocating motion under the assistance of a flow guide and a spring. This valve can be installed either horizontally or vertically. When the medium flows in the forward direction, it pushes the disc to open along the axis, providing a completely straight-through flow path with extremely low pressure loss. When the medium stops or flows backward, the disc quickly returns to its closed position under spring force and reverse medium pressure, offering reliable sealing with minimal water hammer impact. It is specifically designed for piping systems requiring low flow resistance and high-frequency opening and closing. Widely used in long-distance pipelines, water injection systems, petrochemical plants, seawater desalination and similar projects, it serves as a key protective device ensuring efficient and stable system operation.GLH41W Axial Flow Check Valve Product Image

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H41H Forged Steel Lift Check Valve

Model：
H41H-16P/H41H-25P/H41H-10C/H41H-16C/H41H-40P
Specification：
DN15-50
Pressure：
PN16,PN25,PN40
Material：
forged steel、forged stainless steel

H41H Forged Steel Lift Check Valve Overview The H41H Forged Steel Lift Check Valve is an automatic valve that utilizes a forged valve body and operates through the vertical lifting and lowering motion of its disc to achieve unidirectional flow control. The valve body is typically constructed from forged steel materials such as A105, ensuring robust and compact construction. It features a metal hard-seal design, with the sealing surfaces of the disc and seat often overlay-welded with hard alloys. Its working principle involves the disc being lifted open by the pressure of forward-flowing medium. When the medium flow ceases or reverses, the disc rapidly returns to the seat under its own weight and reverse pressure, achieving a tight seal. Designed to meet high standards for pressure resistance, this valve is suitable for demanding applications involving high temperatures, high pressures, high flow velocities, and stringent sealing requirements. It is widely used in pipelines for power plants, petrochemical industries, steam systems, and high-pressure water supply systems, serving as a critical component to prevent medium backflow.H41H Forged Steel Lift Check Valve Product Image

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H61H Forged Steel Internal Thread Check Valve

Model：
H61H-150LB/H61H-300LB/H61H-600LB/H61H-900LB/H61H-1500LB
Specification：
DN15-50
Pressure：
PN6-PN150
Material：
forged steel, forged stainless steel

H61H Forged Steel Internal Thread Check Valve OverviewThe H61H Forged Steel Internal Thread Check Valve is a lift-type automatic valve featuring a forged steel body and internal thread connections. The valve body is constructed from forged steel materials such as A105, which through the forging process achieves a dense structure and excellent mechanical properties. It employs a metal hard-seal design, relying on the vertical movement of the disc within the guide cylinder for operation: the disc lifts open under forward medium flow and rapidly returns under its own weight to close when the medium stops or reverses.Designed specifically for small-diameter pipelines under high pressure and high temperature conditions, this valve must be installed horizontally. It is widely used in systems such as power plants, petrochemical facilities, high-pressure boiler feedwater lines, and instrument measurement pipelines, serving as a critical compact safety device to prevent backflow of water, steam, oil, and other media.H61H Forged Steel Internal Thread Check Valve Product Image

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H61Y Power Plant High-Temperature High-Pressure Welded Check Valve

Model：
H61Y-250C/H61Y-320C/P54140V/P54170V/P57170V
Specification：
DN10-DN100
Pressure：
20Mpa-32Mpa
Material：
Carbon Steel, forged steel, Cr-Mo-V Steel

H61Y Power Plant High-Temperature High-Pressure Welded Check Valve Overview The H61Y Power Plant High-Temperature High-Pressure Welded Check Valve is a high-performance valve specifically designed for critical systems in power plants, featuring welded end connections and a swing-type structure. The valve body and key components are made of high-temperature-resistant materials such as chromium-molybdenum alloy steel or stainless steel, typically conforming to ASTM A182 standards.Internally, the valve employs a metal hard seal overlay-welded with hard alloys. It opens under the pressure of forward-flowing medium and closes rapidly and automatically under the disc's own weight and reverse pressure.Designed for ultra-high parameter applications such as main steam lines and high-temperature feedwater pipelines, this valve must be permanently welded to the pipeline using stringent welding procedures to eliminate any risk of leakage. It serves as a critical component for ensuring the safety of core equipment in power plants, including boilers and turbines, by preventing medium backflow and mitigating water hammer effects in the system.H61Y Power Plant High-Temperature High-Pressure Welded Check Valve Product Drawing

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H41W Lift Check Valve

Model：
H41W-25I/H41W-40I/H41W-64I/H41W-10I/H41W-25P/H41W-40P/H41W-64P/H41W-10P/H41W-10C/H41W-25C/H41W-40C
Specification：
DN15-200
Pressure：
PN25,PN40,PN64
Material：
Stainless Steel,carbon steel,Cr-Mo-V Steel

H41W Lift Check Valve Overview The H41W Lift Check Valve is an automatic valve that utilizes flanged connections and operates through the vertical lifting and lowering motion of its disc to achieve unidirectional flow control. The valve body is typically constructed from materials such as cast steel, stainless steel, or cast iron, featuring a metal-sealed internal structure where the sealing surfaces of the disc and seat are often made of the base material or overlay-welded with alloy.Its working principle involves the disc being lifted open by the pressure of forward-flowing medium and automatically closing by rapidly returning to the seat under its own weight and reverse pressure when the medium stops or reverses.Designed specifically for horizontal pipelines, this valve offers a simple and reliable structure. It is suitable for pipeline systems handling media such as water, steam, and oil products, with nominal pressure ratings ranging from PN16 to PN160. Widely used in petroleum, chemical, power, water supply, and drainage industries, it serves as a fundamental safety device to prevent medium backflow.H41W Lift Check Valve Product Image

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H42F46 Fluorine-Lined Lift Check Valve

Model：
H42F46-16C/H42F46-10C/H42F46-25C/H42F46-16/H42F46-10/H42F46-25/H42F46-16P/H42F46-25P
Specification：
DN25-DN150
Pressure：
PN10,PN16,PN25
Material：
Cast Iron, Cast Steel, Stainless Steel Lined with FEP/PTFE

H42F46 Fluorine-Lined Lift Check Valve OverviewThe H42F46 Fluorine-Lined Lift Check Valve is a specialized valve designed for highly corrosive media. Its valve body and inner surface are entirely lined with fluoroplastic materials such as perfluoroalkoxy (FEP) or polytetrafluoroethylene (PTFE). Featuring flanged connections and a lift-type structure, the valve achieves unidirectional flow control through the vertical motion of its disc.The working principle involves the disc lifting open under the pressure of forward-flowing medium and automatically closing under its own weight and reverse pressure when the medium stops or reverses. The sealing surfaces are typically composed of corrosion-resistant alloys or fluoroplastics.By leveraging the exceptional chemical inertness of fluoroplastics, this valve can withstand erosion from most strong acids, strong alkalis, organic solvents, and various mixed corrosive media. It is widely used in corrosive media pipeline systems across industries such as chemical processing, pharmaceuticals, metallurgy, electroplating, and environmental protection, serving as a critical safety device to prevent the backflow of harmful media.H42F46 Fluorine-Lined Lift Check Valve Product Image

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

DRVZ Nozzle Check Valve

HC41X Muffler Check Valve

H12W Internal Thread Brass Lift Check Valve

H42W Vertical Check Valve

H71W Wafer Check Valve

H71H Lift Type Wafer Check Valve

GLH41W Axial Flow Check Valve

H41H Forged Steel Lift Check Valve

H61H Forged Steel Internal Thread Check Valve

H61Y Power Plant High-Temperature High-Pressure Welded Check Valve

H41W Lift Check Valve

H42F46 Fluorine-Lined Lift Check Valve

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