Forged Steel Valve

Forged Steel Piston Check Valve

Product Description

XDV Forged steel Check Valves are designed and manufactured strictly to International Standards AP1 602, ASME B16.34 or Equivalent, to reduce the flow resistance and pressure drop to the minimum possible extend, which is suitable to be mounted in horizontal position only, lapped and screwed in seat ring ensures tight shut of and long duration service. Valve's disc is perfectly designed, accurately machined and guided for efficient automatic shut off at zero pressure, with a feature of compact structure & Low emission service. In both Swing & Piston Constructions.

PDF download Contact Online Inqury

Product Range&Features

Size	3/8"~2-1/2"
Rating	150LB~2500LB
Body Materials	Carbon Steel, Stainless Steel, Alloy Steel, Duplex S.S. XDSS, etc.
Design Standards	API 602/ASME B16.34
Face to Face Standards	ASME B16.10
Flange Dimension Standards	ASME B 16.5
Pressure Test Standards	API598
Quality/Product Certifications	ISO9001, ISO14001, ISO18001
Fugitive Emissions	ISO 15848-1, API 622
NACE	NACE MR 0103 NACE MR 0175
Shutoff Class	API 598 (Zero Leakage), API 6D
End Connection	RF, RTJ, NPT, SW

Product Details

Swing Check Valve
NO.	PAPT NAME	MATERIAL-ASTM
1	BODY	ASTM A105
2	SEAT	ASTM A182 F6A
3	NUT	ASTM A192 2H
4	DISC	ASTM A182 F6A
5	HINGE	ASTM A105
6	PIN	ASTM A276 410
7	FORK FRAME	SS304
8	GASKET	SS304 GRAPHITE
9	BONNET	ASTM A105
10	HEX BOLT	ASTM A193 B7
11	NAMEPLATE	SS304
12	RIVET	COPPER

Lift Check Valve
NO.	PAPT NAME	MATERIAL-ASTM
1	BODY	ASTM A105 13CR
2	DISC	ASTM A182 F6A
3	SPRING	SS304
4	GASKET	SS304 GRAPHITE
5	BONNET	ASTM A105
6	HEX BOLT	ASTM A193 B7
7	NAMEPLATE	SS304
8	RIVET	COPPER

Service and Repair

Only authorized persons should perform service and repair with appropriate tools and, if it is possible, using original spare parts. Personal protection should be applied in accordance with valid regulations and legalizations.
Attention should always be paid to the reliability of the valves and parameters of the working implementation / plant, and only materials which can successfully replace those originally installed should be used.
For highly reliable valves (valves which work with high temperatures, high pressures or with dangerous fluids) any service, repair or replacement should be done professionally and responsibly in accordance with valid regulations for safe working conditions at the plant.
Before the service or reinstallation of the valves, the plant or installation should be taken out of operation (pressure 0 bar, temperature of valves should be the same temperature as the environment).
Every Lift Check Valve serviced or repaired should be subject to all necessary tests usually performed for a newly produced Lift Check Valve

Valve installation

After the removal of the protection covers it is necessary to thoroughly clean inside the swing check valve with compressed air.
When installing valves with flanged ends it is necessary to take into consideration the selection of adequate bolt material and the appropriate type of gasket depending on the type of working fluid, pressure, temperature, and the type of flange facing. It is necessary to install gaskets strictly in accordance with instructions given from the manufacturer of the gaskets.
Valves with welding ends should be welded onto the pipeline by an expert and with appropriate WPS. After welding, if necessary, local normalization should be performed and the inside of the pipeline should be cleaned to remove possible welding remains.
At the moment of installation the influence of the load of the pipeline on the valve should be reduced. The same also applies for temperature oscillation, hydraulic impact and similar. The valve should not be used as a support for a pipeline.
It is important to take care about the flow direction at the time of installation. The flow direction is indicated with the arrow mark imprinted on the body of the lift check valve.

Troubleshooting guide

FAILURE	PROBABLE CAUSE	SOLUTION
Absence of flow	Improperly installed product in relation to the allowed flow	Valve installed in allowed flow direction
	Improperly installed product in relation to the permitted mounting position	Valve installed in allowed mounting position
	Protection covers are not removed	Remove protection covers from connection ends
Reduced or aggravated flow	Dirty valve or pipeline	Check and clean valve or pipeline
Reduced or aggravated flow	Valve is not completely open	Open the valve completely
Leakage on cover gasket	Nuts are not tightened	Open the valve completely
	Cover gasket is damaged	Tighten Nuts
	Mechanical damages of seat or disc C	Disassemble cover and replace cover gasket with new one
	Working medium contains solid dirt particles	Clean Valve thoroughly. (Then, install Strainer before Check Valve)