Check Valves - Apollo Valves
Check valves are mechanical devices designed to allow fluid—whether liquid or gas—to flow in only one direction, preventing backflow that can damage equipment or disrupt system performance. Commonly used in industrial, plumbing, and MRO (maintenance, repair, and operations) systems, they automatically open with forward flow and close when flow reverses. Available in various types like swing, ball, and inline designs, check valves are essential for ensuring system integrity, protecting pumps and compressors, and maintaining operational safety.
Types of Check Valves We Offer:
- Swing Check Valves – Ideal for irrigation and low-pressure systems
- Ball Check Valves – Reliable for wastewater and slurry applications
- Piston Check Valves – Designed for precise flow control in hydraulic systems
We partner with leading manufacturers to provide top-quality materials and engineering in every check valve we supply. Browse our extensive selection and find the perfect check valve for your needs. Order online today or contact our experts for assistance!
Related categories: Valves | Needle Valves | Control Valves | Cryogenic Valves | Lined Valves
Filter
Filter
528 items
content loaded
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$287.21$340.06
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$474.63$561.96
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$417.37$494.16
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$203.75$241.24
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$431.18$510.51
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$435.46$515.58
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$188.57$223.26
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$331.61$392.62
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$188.32$222.97
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$406.19$480.93
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$196.60$232.77
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$163.90$194.06
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$304.32$360.31
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$163.90$194.06
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$406.20$480.94
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF60GBPC is a Type 1 Double Check Detector Assembly. It is commonly found in industrial processing, plumbing, and HVAC applications. The 4ANLF60GBPC reflects Apollo's long-standing reputation for quality and innovation. It is designed to comply with applicable UL and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF60HBPC is a Type 1 Double Check Detector Assembly. Typical applications span fire protection, HVAC, and commercial mechanical systems environments. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF600BPC is a Type 1 Double Check Detector Assembly. Typical applications span fire protection, HVAC, and plumbing environments. Backed by Apollo's commitment to quality, the 4ANLF600BPC is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF60ABPC is a Type 1 Double Check Detector Assembly. It is commonly found in HVAC, oil and gas, and industrial processing applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant FM and ASME standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF60CBPC is a Type 1 Double Check Detector Assembly. This product serves professionals across industrial processing, marine, and HVAC sectors. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable NSF and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF60EBPC is a Type 1 Double Check Detector Assembly. This product serves professionals across HVAC, plumbing, and commercial mechanical systems sectors. The 4ANLF60EBPC reflects Apollo's long-standing reputation for quality and innovation. This product meets relevant ASME and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF60GBPE is a Type 1 Double Check Detector Assembly. This product serves professionals across HVAC, oil and gas, and commercial mechanical systems sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant NSF and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF60HBPE from Apollo is a Type 1 Double Check Detector Assembly. This product serves professionals across plumbing, fire protection, and industrial processing sectors. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF600BPE is a Type 1 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, oil and gas, and fire protection sectors. Backed by Apollo's commitment to quality, the 4ANLF600BPE is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$287.21$340.06
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$474.63$561.96
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$417.37$494.16
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$203.75$241.24
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$431.18$510.51
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$435.46$515.58
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$188.57$223.26
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$331.61$392.62
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$188.32$222.97
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$406.19$480.93
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$196.60$232.77
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$163.90$194.06
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$304.32$360.31
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$163.90$194.06
Available for Purchase
Subject to factory lead times
The Apollo® 62-500 Series Check Valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow.No Radial Alignment NeededBubble-Tight Shut-Off, Ideally Suited for Gaseous ServiceFluorocarbon (Rubber) Soft Seat for Reduced Noise and VibrationSpring Loaded for Fast Seating ActionStraight Through Flow Minimizes Velocity ChangeSpring is Fully Protected from Flow SteamMade in the USA
$406.20$480.94
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF60GBPC is a Type 1 Double Check Detector Assembly. It is commonly found in industrial processing, plumbing, and HVAC applications. The 4ANLF60GBPC reflects Apollo's long-standing reputation for quality and innovation. It is designed to comply with applicable UL and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF60HBPC is a Type 1 Double Check Detector Assembly. Typical applications span fire protection, HVAC, and commercial mechanical systems environments. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF600BPC is a Type 1 Double Check Detector Assembly. Typical applications span fire protection, HVAC, and plumbing environments. Backed by Apollo's commitment to quality, the 4ANLF600BPC is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF60ABPC is a Type 1 Double Check Detector Assembly. It is commonly found in HVAC, oil and gas, and industrial processing applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant FM and ASME standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF60CBPC is a Type 1 Double Check Detector Assembly. This product serves professionals across industrial processing, marine, and HVAC sectors. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable NSF and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF60EBPC is a Type 1 Double Check Detector Assembly. This product serves professionals across HVAC, plumbing, and commercial mechanical systems sectors. The 4ANLF60EBPC reflects Apollo's long-standing reputation for quality and innovation. This product meets relevant ASME and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF60GBPE is a Type 1 Double Check Detector Assembly. This product serves professionals across HVAC, oil and gas, and commercial mechanical systems sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant NSF and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF60HBPE from Apollo is a Type 1 Double Check Detector Assembly. This product serves professionals across plumbing, fire protection, and industrial processing sectors. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF600BPE is a Type 1 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, oil and gas, and fire protection sectors. Backed by Apollo's commitment to quality, the 4ANLF600BPE is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
FAQS
- A check valve is a one way valve that allows fluid to flow in one direction only and automatically prevents backflow in a piping system.
- A check valve opens when fluid flows in the correct direction and closes when flow stops or reverses. The closing mechanism may use a disc, ball, flap, or spring depending on the valve design.
- Check valves are used to protect pumps, compressors, piping, and equipment from damage caused by reverse flow. They are commonly installed on pump discharge lines.
- Swing check valves rely on gravity and flow to open and close, while spring loaded check valves use a spring to close quickly and reduce water hammer.
- Check valves are made from materials such as cast iron, ductile iron, stainless steel, brass, bronze, PVC, CPVC, and other plastics depending on application needs.