Model No. H44 Nominal Diameter: 2"-48" Nomianl Pressure: Class 150Lb~2500Lb API Standard Flanged End

Features: 1.Design standard conforms to ANSIB16.34 and API16D. 2. swing disc, through way type, fit to both of vertical and horizontal pipelines. 3. internal installation type rocker to decrease external leakage. 4. Body and bonnet are bolt connection. Under high pressure (PN≥10MPa), it is internal pressure self-seal structure for middle flange, so the valve is small in size, light in weight and reliable in sealing. Standard:

name	check valve
design standard	APl6D．JlS B2074-2084
face to face	ANSIB16.10, JISB2002
CW flange	ANSI B16.5, JISB2212-2214
dimension of butt welding end	ANSlB16.25
Inspection and testing	APl6D or APl598, JlSB2003

Testing standard:

Pressure class and nominal pressure	(Mpa) Shell testing	(MPa) sealing testing
		High pressure liquid seal	Low pressure air-tight seal
150Lb．PN2.0MPa	2.94	2.16	0.6
300Lb．PN5．OMPa	7.67	5.62
600Lb．PNl O.OMPa	15.3	11.23
JISlOK	2.1	1.6
JIS20K	5.1	3.8

Materials list

part name			material
body bonnet disc rocker			ASTM A216 WCB			ASTM A351 CFB	ASTM A351 CF8M	ASTM A351 CF3	ASTM A351 CF3M
pin roll			1Crl3			OCrl8Ni9	OCrl7Nil2M02	OOCrl9Nil0	OOCrl7Nil4M02
			F6a			304	316	304L	316L
disc		seal surface	13Cr	13Cr	STL	noumenon noumenon STL noumenon STLR STL
seat			13Cr	STL	STL
Disc nut			1Crl3			0Crl8Ni9	OCrl7Nil2M02	00Crl9NilO	OOCrl7Ni4M02
			410			304	316	304L	316L
Check pin			OCCr8Ni9				0Crl7Nil2M02	00Crl9NilO	00Crl7Nil4M02
			304				316	304L	316L
gasket			Flexible graphite complicated pad(core plate: carbon steel or stainless steel) stainless steel tape, flexible graphite wound pad
Middle flange bolt			350CrM0 ASTM A193 B7			OCr18Ni9 ASTMA193 B8
Middle flange nut			45 ASTM A1 94 2H			OCr18Ni9 ASTM A194 8
Working condition	media		Water, vapor, oil, etc.			nitric acid and other corrosive media	strong oxidizing media	acetic acid and other corrosive media	urea and other corrosive media.
	(℃) Temp.		-29～425			-40～200