J41F4 Fluorine Lined Diaphragm Valve produced and sold by Baigang Valve Group is a special form of cut-off valve, which appeared in the 1920s.Its opening and closing part is a piece of diaphragm made of soft material, the valve body cavity and the valve cover cavity and drive parts are separated, so called diaphragm valve.

J41F4 Fluorine Lined Diaphragm Valve product principle

Diaphragm valve is in the valve body and the valve cover with a flexible diaphragm or a combination of the diaphragm, the closing member is connected with the diaphragm of a compression device, the structure of the valve with a very different form, is a special form of the cut-off valve , Its opening and closing parts by the steel flap and soft material (rubber and fluorine plastic compound) made of diaphragm, and the body cavity separated to achieve the purpose of cutting off the media inside the tube.

J41F4 Fluorine Lined Diaphragm Valve main components of the material table

Serial number	Part Name	grey cast iron	Cast steel	Stainless steel acid-proof		Ultra-low carbon stainless steel acid-proof
		Z	C	P	R	PL	RL
1	Body / bonnet	HT250	WCB	CF8	CF8M	CF3	CF3M
2	Disc / stem	25	2Cr13	1Cr18Ni9	1Cr18Ni12Mo2Ti	00Cr18Ni10	00Cr17Ni14Mo2
3	Lining / seat	PCTEF (F3), FEP (F46), PFA (Soluble F4), PP, PO
4	Diaphragm	FEP (F46) / CR (neoprene) PFA (soluble F4) / FPDM (ethylene propylene rubber)
5	Bracket	PTFE (F4)		CF8		CF8
6	Stem nut	ZCuAl10Fe3		ZCuAl10Fe3		ZCuAl10Fe3
7	Tighten the bolts	35		1Cr17Ni2		1Cr18Ni9Ti
8	Nut	45		0Cr18Ni9		0Cr18Ni9
9	Handwheel	WCB		WCB		WCB

J41F4 Fluorine Lined Diaphragm Valve main dimensions and connection dimensions

Nominal diameter		L	D	D1	D2	f	b	Z-φd	D	D1	D2	f	b	Z-φd
DN (mm)	NPS (inch)		PN1.0MPa						PN1.6MPa
15	1/2	125	80	55	40	2	12	4-φ12	95	65	45	2	14	4-φ14
20	3/4	135	90	65	50	2	14	4-φ12	105	75	55	2	16	4-φ14
25	1	145	100	75	60	2	14	4-φ12	115	85	65	2	16	4-φ14
32	5/4	160	120	90	70	2	16	4-φ14	135	100	78	2	18	4-φ18
40	3/2	180	130	100	80	3	16	4-φ14	145	110	85	3	18	4-φ18
50	2	210	140	110	90	3	16	4-φ14	160	125	100	3	20	4-φ18
65	5/2	250	160	130	110	3	16	4-φ14	180	145	120	3	20	4-φ18
80	3	300	185	150	125	3	18	4-φ18	195	160	135	3	22	4-φ18
100	4	350	205	170	145	3	18	4-φ18	215	180	155	3	22	8-φ18
125	5	400	235	200	175	3	20	8-φ18	245	210	185	3	24	8-φ18
150	6	460	260	225	200	3	20	8-φ18	280	240	210	3	24	8-φ23
200	8	570	315	280	255	3	22	8-φ18	335	295	265	3	26	8-φ23
250	10	680	370	335	310	3	24	12-φ28	390	350	320	3	28	12-φ23
300	12	790	435	395	362	4	24	12-φ23	440	400	368	4	28	12-φ23