Flanged Diaphragm Valves-Ningbo Baodi Plastic Valve Co., Ltd.

product product product product product product product product product product product product

Manual Diaphragm Valve

Home / Products / Manual Valve / Manual Diaphragm Valve / Flanged Diaphragm Valves

PREV：True Union Diaphragm Valves NEXT：No next article

Parts&Materials
Demensions&Specifications
Options
FAQ
Contact Us

NO.	Parts	Materials
1	Gauge Cover	PC
2	Stud Nut	steel，stainless steel
3	Hand Wheel	ABS，PPG
4	Bonnet	PPG，FRPP，PPH，UPVC，CPVC，PVDF
5	Sleeve	Cast iron with nickel plating,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，PVDF，CPVC，cast iron
11	Cushion	EPDM，FPM
12	Diaphragm	EPDM，FPM，PVDF，FEP，PFA，PTFE
13	Grease Nipple	DN80，80-250used only，copper alloy，stainless steel

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
	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

Dimensions Table

DN	D1（mm）			D（mm）			L（mm）				h（mm）	n			φ（mm）

	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	130	110	110/108	14	4	4	4	14	15	16

20	105	100	100	75	75	70	135	150	120	120/150	16	4	4	4	14	15	16

25	115	125	125	85	90	79	145	160	130	130/150	16	4	4	4	14	15	16

32	135	135	135	100	100	89	160	180	142*	160	16	4	4	4	18	19	16

40	145	145	145	110	105	98	180	200	180	180/176	16	4	4	4	18	19	16


50	160	160	160	125	120	121	210	230	210	210/202	18	4	4	4	18	19	19
65	180	180	180	145	140	140	250	290*	250	250	22	4	4	4	18	19	19
80	195	195	195	160	150	152	300	310	280	280/264*	25	8	8	4	18	19	19

100	215	220	220	180	175	190	350	350	340	340/329*	25	8	8	8	18	19	19
125	255	255	255	210	210	216	400	400	410	410	30	8	8	8	18	19	22

150	280	280	280	240	240	241	460	480	480	480	30	8	8	8	22	23	22
200	340	340	340	295	290	298	575	600*	570	570	38	8	12	8	22	23	22

250	395	395	395	350	355	362	685	730*	680	680	38	12	12	12	22	25	26

300	480	480	480	400	400	432	790				40	12	16	12	22	25	26

Our Main Products

Why Us

Ningbo Baodi Plastic Valve Co., Ltd.

Ningbo Baodi Plastic Valve Co., Ltd. traces its origins back to 1979 and is recognized as one of the earliest enterprises in China to design and produce industrial plastic valves, having received acceptance from the Ministry of Chemical Industry.

Over the past 47 years since its founding, the company has designed and manufactured a wide range of plastic valves for the most demanding industries. It has served tens of thousands of enterprises both domestically and internationally, with exports to more than 60 countries, consistently remaining a leading manufacturer of industrial thermoplastic valves and piping systems. Our professional service and stable quality have always been highly recognized and appreciated by customers worldwide.

Certificate Of Honor

News

Which check valve Type Is Best Suited for Your Specific Fluid Control System
2026-06-19
In modern fluid transport and control systems, preventing medium backflow is a core link to ensure safe and stable system operation. As a valve that automatically opens and closes relying on the flow ...
READ MORE
How Do PVC Ball Valves and Check Valves Work in Industrial Piping Systems
2026-06-12
In modern industrial fluid transport systems, plastic valves have become essential components for pipeline control, finding widespread application in water treatment systems, chemical media transport,...
READ MORE
How to Choose and Install the Right UPVC Pipe and Fittings for Your Drainage System
2026-06-05
UPVC pipe systems occupy a core position in modern architectural drainage, chemical transport, and industrial fluid handling sectors. Relying on their excellent corrosion resistance, stable chemical a...
READ MORE
How to Choose the Best Check Valve for Your Fluid Control System Application
2026-05-29
In industrial fluid transmission, municipal water supply, and complex pneumatic systems, achieving one-way flow control is essential for system safety and efficient operation. As a fundamental and cri...
READ MORE
How Can an Automatic Butterfly Valve Optimize Your Industrial Fluid Control Efficiency
2026-05-22
In modern industrial fluid control systems, precise regulation and efficient shut-off are core requirements for ensuring production safety and process stability. automatic butterfly valve, as a simple...
READ MORE
How to Choose Between a Spring Check Valve and a Wafer Check Valve for High-Pressure Systems
2026-05-15
In the design and maintenance of modern fluid pipeline systems, medium backflow is a critical concern that can lead to system pressure fluctuations, contamination of upstream water sources, pump rever...
READ MORE
How to Optimize Industrial Fluid Efficiency with Automatic Ball Valve and Smart Control Systems
2026-05-08
In the current global Industry 4.0 process, the precision and automation level of fluid control systems have become essential metrics for evaluating the advancement of production lines. As control log...
READ MORE
How to Choose Between Manual and Pneumatic Diaphragm Valves
2026-05-01
Difference Between Manual and Pneumatic Diaphragm Valves In industrial production and pipeline control systems, diaphragm valves are essential control components widely used for regulating the flow of...
READ MORE
How to Select Diaphragm Material for Manual Diaphragm Valve? Performance Comparison of EPDM, Viton, and PTFE
2026-04-24
The diaphragm is the core component of the diaphragm valve, directly affecting the valve's corrosion resistance, pressure rating, service life, and application range. EPDM, Viton, and PTFE are the thr...
READ MORE
What temperature range can manual butterfly valves withstand for industrial applications
2026-04-17
Understanding the Critical Temperature Parameters for Manual Butterfly Valves Manual butterfly valves are fundamental components in industrial systems, and their operational temperature range is one o...
READ MORE
Why Are Check Valves Essential for Efficient Sewage Treatment Systems
2026-04-10
In modern sewage treatment systems, check valves play a critical role as one of the key control devices. Their main function is to prevent backflow of the medium and ensure the stable operation of the...
READ MORE
How to Choose the Right Manual Diaphragm Valve for Your Fluid Medium
2026-04-03
Manual diaphragm valves are widely used in fluid control systems due to their reliable sealing performance, easy operation, and excellent corrosion resistance. These valves are commonly applied in ind...
READ MORE