Products

Check Valves

Check Valve Detail

The primary function of a Check Valve is to prevent backflow, enabling the flow control of media and ensuring that only a one-way direction of fluid flow is possible. If the flow reverses for any reason, such as pressure, velocity changes, or water hammer, the spring or arm-operated disc automatically closes.

Range

Ductile Iron Swing Check Valve VT493N

Weight: 11kg – 235kg

Sizes: DN 50 – 350

Class: 150

Pressure: PN16

Temperatures: -10°C to 400°C

Cast Iron Dual Plate Wafer Check VT493

Weight: 1.5kg – 172kg

Sizes: DN 50 – 600

Class: 150

Pressure: PN16

Temperatures: -10°C to 120°C

Cast Iron Swing Check Valve VT493

Weight: 11kg – 461kg

Sizes: DN 50 – 350

Class: 125

Pressure: PN14

Temperatures: -10°C to 230°C

Check Valve Price and Stock Availability

NPS	NPS1##	NPS2##	2	2.5	3	4	5	6	8	10	12	14	16	18	20	24
DN	##	##	50	65	80	100	125	150	200	250	300	350	400	450	500	600
Swing Check	Ductile Iron DISwingN	Quantity	1	5	7	23	2	5	11	0	0	0	Not available	##	##	##
		Price	R1,880	R2,300	R2,560	R3,590	R5,070	R6,380	R10,560	R16,740	R24,340	R40,640	Not available	##	##	##
	Cast Iron CISWING	Quantity	2	0	1	0	0	7	1	3	0	1	Not available	##	##	##
		Price	R1,880	R2,210	R2,560	R3,450	R4,970	R6,380	R10,560	R16,740	R23,870	R40,640	Not available	##	##	##
Dual Wafer Check NPDI Disc	Cast Iron CIDUALR16-NN	Quantity	0	0	0	19	0	10	0	4	2	0	0	0	0	1
		Price	R320	R390	R520	R615	R795	R970	R1,610	R2,570	R3,800	R5,335	R9,320	R11,380	R14,100	R25,100
	Cast Iron CIDUALR16N	Quantity	35	10	19	2	7	0	8	0	3	0	6	0	0	1
		Price	R320	R390	R520	R615	R795	R870	R1,610	R2,570	R3,800	R4,550	R9,320	R9,680	R12,020	R25,100
Dual Wafer Check SS Disc	Cast Iron CIDUALR16-NS	Quantity	17	1	0	16	6	0	0	10	0	10	0	0	4	0
		Price	R380	R440	R580	R735	R980	R1,460	R2,480	R4,010	R6,050	R10,030	R15,540	R19,580	R25,800	R31,360
	Cast Iron CIDUALR16	Quantity	0	0	17	0	2	3	0	0	0	0	1	5	0	0
		Price	R320	R375	R580	R620	R980	R1,460	R2,110	R3,420	R5,240	R8,720	R15,540	R19,580	R22,000	R34,000

Please click here to review Valvetech T&C’s. Price and Stock are subject to change. All prices Exclude Drilling and are Exclusive of VAT. Last Updated: 04/11/2024

Application

With a Swing Check Valve, the hinged-disc swings open during a forward motion of media which allows for minimal resistance of flow. The Dual Plated Wafer Check Valve, however, has two spring-loaded plates that open swiftly and independently of each other. Because both mechanisms are self-actuating, there is no need for mechanical or electronic control systems, making these devices a cost-effect alternative to complex installations.

They can be installed in various positions, both horizontally, diagonally, or vertically, and are secured either via drilled flanges, or seated between the flanges of connecting pipes. The main consideration for the installation is the flow of media, the direction of which is indicated on the valve itself for ease of use and understanding.

Advantages:

Prevents Backflow by immediately closing the valve, therefore blocking the backwards regression of media back into the system,
No Electric or Manual Intervention as changes in pressure or media flow direction create a passive yet immediate gravitational response
Reduces Water Hammer impact when a sudden unexpected pressure surge occurs
Low Maintenance due to the efficient design and fewer moving parts. The self-actuating mechanism has no complex componets
Versatile Applications due to their ability to operate in high-and-low-pressure water, oil, gas, wastewater and plumbing systems

Disadvantages:

Limited flow control as they do not have a variable control mechanism; consider a Butterfly Valve if flow control is a requirement
Potential for clogging due to the arm or stem being the anchor for the disc; consider a Gate Valve if this is a concern
Pressure Drops as a closed Check Valve can lead to drop in pressure in the system. Consider a Gate Valve if this is a concern
Loud banging noise when a water hammer occurs after a sudden change in flow direction. Consider a Globe Valve if this is a concern

Common Industry Uses:

HVAC Systems to regulate fluid flow and prevent the reverse flow of refrigerants or other fluids
Water Treatment purification plants to manage the flow of water, preventing backflow and contamination
Mining and Ore Processing to regulate the flow of slurry and other fluids, ensuring efficient processing and preventing damage to equipment
Pulp and Paper Industry to control the flow of liquids and gases involved in various production processes
Power Generation where maintaining the direction of fluid flow in steam, water, or gas systems is critical

Check Valve Specifications

Services

Petrochemicals and Petroleum, Refineries, Primary Energy, Agriculture, Water Works, HVAC

Industries

Water, Oil, Gas, Steam

Priority Media

Acetylene, Borax, Castor Oil, Caustic Soda, Detergents, Diethylene Glycol, Gasoline, Hydraulic Oil, Linseed Oil, Methyl Acetone, Nitrogen, Oxygen, Mercury, Propane Gas, Sodium Sulphate

For full Check Valve list, see Media Compatibility Table

Also Known As

Check Valve

Non-return Valve

Stop Valve

One-Way Valve

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