DASKM Engineering Industries

Ball Type NRV

Characteristics:
Ball Type (NRV) was the first of the valve at DASKM with unique design and technology for the first time in India. A very simple and robust design with no mechanism involved. The heart of valve is rubber coated ball. The mechanism hinge-pin-disc used in conventional check valves is eliminated and DASKM has put in this rubber coated ball to arrest flow media in return condition.

As the pump starts, the ball moves out totally from the flow path when the pumping is on giving a full bore maximum flow/discharge with minimum head losses. As the pump stops, the ball rolls back and seats perfectly on the rounded valves seat ensuring totally leak proof sealing.

Salient Features:
1. Lowest possible pressure drop across the valves.
2. 100% leak proof sealing years over years.
3. Non-clogging and self cleaning as ball rotates during operation.
4. Virtually no wear and tear, no maintenance and longer service life.
5. Higher solid handling capacity due to full bore and straight internal path.
6. Lower head loss-high discharge, reduced pumping time-All leading to Energy Saving.

Applications:
Clean water, Raw water, Sewage, Slurry, Waste water, Viscous liquids etc.

Used in industries like:
Fire fighting, Plumbing, Water distribution, Water/Sewage treatment, Irrigation/agriculture, Sewage plants, Steel mills, Power stations, Chemical / process industries, HVAC, Sugar/food industry, Breweries, Mining and many more.

non-return-valves

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DESCRIPTION	STANDARD MATERIAL	ON REQUEST
BODY/COVER	CAST IRON (GG25)	S.G.IRON(DI)/WCB/ST.STEEL
BALL	NITRILE REINFORCED	NEOPRENE/EPDM
SEAT RING	L T BRONZE	ST.STEEL
FASTENERS	CARBON STEEL	ST. STEEL
PAINT	ENAMEL/EPOXY PAINT
END CONNECTION	FLANGED
SIZE RANGE	25mm TO 350mm
PRESSURE TESTING	BODY: 1.5 X PN
	SEAT : 1.1 X PN
PRESSURE RATING - KPa
25mm TO 125mm	PN 1.6
150mm TO 300mm	PN 1.0
350mm	PN 0.6
INSTALLATION	HORIZONTAL AS WELL AS VERTICAL
FACE TO FACE LENGTH	IS 5312 PART I -1984/ DIN 3202-F6
TEMPERATURE	SUITABLE UPTO 800C

Cast Steel Lift Check Valve

ND Lift Check Valve

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ASA Lift Check Valve

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DASKM Lift Type Check Valves are designed to reduce the flow resistance and pressure drop to the minimum possible extend. Lift check valves are suitable to mount in horizontal position only. Accurately machined, lapped and screwed in seat ring ensures tight shut off and long life. The valve disc is perfectly designed, accurately machined and guided for efficient automatic shut off at zero pressure. As an option seat can b weld deposited or integrated with body in case of stainless steel and other high alloy metals.

DASKM Lift Check Valves are available from size range 1” t 12” in Flanged End / Butt Weld End Connection, generally in all material of construction and up to 600# pressure rating.

Swing Type Check Valve Flanged

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Design & Testing International Standard of Swing Check Valve

Design Standard	BS 1868 / ASME B 16.34 / API 6D Standard
Inspection & Testing Standard	BS EN ISO 12266 - I (BS 6755 - I) / API 598 / ISO 5208
Flange To Flange Distance	As Per ANSI B 16.10 / API 6D
End Connection	Flanged End to ANSI B 16.5, Class 150 / 300 / 600
	BS 10 Table D / E / F / H
	PN 6 / PN 10 / PN 16 / PN 25 / PN 40 / PN 64
	DIN Standard / JIS Standard / IS Standard
	Butt Weld End to ANSI B 16.25
Manufacturing Size Range	1/2" (DN15) to 24"(DN 600)
Pressure Rating of Valve	150# / 300# / 600#
	PN 10 / PN 16 / PN 25 / PN 40 / PN 64 / PN 100

Wafer Type Check Valve

wafer-type-nrv

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TECHNICAL SPECIFICATIONS

1) Size Range : 40 mm to 600 mm
2) Design & Face to Face Dimensions : API 6D and ANSI B 16.10
3) Pressure testing : API 598
4) Flange Mounting Conformity : ANSI B 16.5 Class 150, DIN PN 10 & 16, BS 10 Table 'D' and 'E'
5) Pressure Rating : PN 16 (Max)

MATERIAL OF CONSTRUCTION :

Body : SGI /WCB/ CF8/ CF8M/CS-IS 2062
Disc : SGI /WCB/CF8/CF8M
Seat : EPDM / Viton/ Nitrile/ Neoprene / Hypalon / PTFE or GFT

Non Return Valves