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Flanged Diaphragm Valve

Features：

● With the birth of the company, we produced the first plastic diaphragm valve in 1979 and obtained the certification of the Ministry of Chemical Industry in 1983.

● Diaphragm valve uses a high quality sealing material, exhibiting lower compressive strain, for its diaphragm and cushion, resulting in optimum sealing performance.

● Diaphragm valve is designed so that pressure is distributed evenly. This design allows the hand wheel torque be reduced and maintain shutt off at low torque.

● Strict control of the processing and assembly process. The flow adjustment is more stable and accurate.

● Diaphragm valve structure has no dead angle, no pollution to the medium, strong corrosion resistance, no packing wear, and excellent internal sealing performance.

Flanged Diaphragm Valve Details

Parts&Material

No.	Parts	Materials
1	Gauge cover	PC
2	Stud nut	Steel, stainless steel
3	Hand wheel	ABS,FRPP
4	Bonnet	HR-PP,FRPP,PPH,UPVC,CPVC,PVDF
5	Sleeve	Cast iron, copper alloy
6	Board	Plastc-coated steel, stainless steel
7	Stud Bolt & Nut	Steel, stainless steel
8	Stem	Steel, stainless steel, copper alloy
9	Body	FRPP,PPH,UPVC,CPVC,PVDF
10	Compressor	PVDF，CPVC，cast iron
11	Cushion	EPDM
12	Diaphragm	EPDM，FPM，FEP，PFA，PTFE
13	Grease Nipple	Copper alloy, stainless steel DN80-300 used only

CV reference value

100% Full open

DN	CV value
15	5.4
20	6.3
25	7.2
32	8.1
40	23.4
50	43.2
65	76.5
80	103.5
100	166.5
125	270
150	360
200	630
250	900
300	900

(Mpa) Temperature%Pressure chart

DN	FRPP			PPH			UPVC		CPVC			PVDF
DN	20℃	60℃	90℃	20℃	60℃	85℃	20℃	50℃	20℃	60℃	85℃	20℃	60℃	90℃	120℃
15	1.0	0.8	0.3	1.0	0.7	0.3	1.0	0.5	1.0	0.8	0.3	1.0	1.0	0.6	0.4
20	1.0	0.8	0.3	1.0	0.7	0.3	1.0	0.5	1.0	0.8	0.3	1.0	1.0	0.6	0.4
25	1.0	0.8	0.3	1.0	0.7	0.3	1.0	0.5	1.0	0.8	0.3	1.0	1.0	0.6	0.4
32	1.0	0.6	0.3	1.0	0.5	0.3	1.0	0.5	1.0	0.6	0.3	1.0	1.0	0.6	0.4
40	1.0	0.6	0.3	1.0	0.5	0.3	1.0	0.5	1.0	0.6	0.3	1.0	1.0	0.6	0.4
50	1.0	0.6	0.3	1.0	0.5	0.3	1.0	0.5	1.0	0.6	0.3	1.0	1.0	0.6	0.4
65	1.0	0.5	0.2	1.0	0.4	0.2	1.0	0.4	1.0	0.5	0.2	1.0	1.0	0.5	0.3
80	1.0	0.5	0.2	1.0	0.4	0.2	1.0	0.4	1.0	0.5	0.2	1.0	1.0	0.5	0.3
100	1.0	0.5	0.2	1.0	0.4	0.2	1.0	0.4	1.0	0.5	0.2	1.0	0.8	0.5	0.3
125	0.5	0.3	0.15	0.5	0.2	0.15	0.6	0.3	0.6	0.3	0.2	0.6	0.6	0.4	0.2
150	0.5	0.3	0.15	0.5	0.2	0.15	0.6	0.3	0.6	0.3	0.2	0.6	0.6	0.4	0.2
200	0.3	0.2	0.1	0.3	0.15	0.1	0.3	0.1	0.3	0.2	0.1	0.4	0.4	0.2	0.1
250	0.3	0.2	0.1	0.3	0.15	0.1	0.3	0.1	0.3	0.2	0.1	0.3	0.3	0.2	0.1
300	0.3	0.2	0.1	0.3	0.15	0.1	0.3	0.1	0.3	0.2	0.1	0.3	0.3	0.2	0.1

The experimental data is EPDM+PTFE double-layer membrane data for reference

Dimensions Table（mm）

DN	D1(mm)			D(mm)			L(mm )			h(mm )	n			φ (mm )
DN	HG/DIN	JIS	ANSI	HG/DIN	JIS	ANSI	HG/DIN	JIS	ANSI		HG/DIN	JIS	ANSI	HG/DIN	JIS	ANSI
15	95	95	95	65	70	60	125	110	110	14	4	4	4	14	15	16
20	105	100	100	75	75	70	135	120	120	16	4	4	4	14	15	16
25	115	125	125	85	90	79	145/160	130	130	16	4	4	4	14	15	16
32	135	135	135	100	100	89	160/180	160	160	16	4	4	4	18	19	16
40	145	145	145	110	105	98	180	180	180	16	4	4	4	18	19	16
50	160	160	160	125	120	121	210/230	210	210	18	4	4	4	18	19	19
65	180	180	180	145	140	140	250	250	250	22	4	4	4	18	19	19
80	195	195	195	160	150	152	300	280	280	25	8	8	4*	18	19	19
100	215	220	220	180	175	190	350	340	340	25	8	8	8	18	19	19
125	255	255	255	210	210	216	405	405	405	30	8	8	8	18	19	22
150	280	280	280	240	240	241	460	460/480	460/480	30	8	8	8	22	23	22
200	340	340	340	295	290	298	575	575	575	38	8	12*	8	22	23	22
250	395	395	395	350	355	362	685	685	685	38	12	12	12	22	25	26
300	480	480	480	400	400	432	790	790	790	40	12	16*	12	22	25	26