Rubber lined control diaphragm valve

Type: Rubber lined control diaphragm valve
Design & Manufactured to API 6D, ASME B16.34 or Equivalent
P.T Ratings to ASME B16.34
Face to Face dimensions to ASME B16.10
Flanged Ends to ASME B16.5
Butt-weld Ends to ASME B16.25
Threaded Ends to ASME B1.20.1
Socket-weld Ends to ASME B16.11
Valves Marking to MSS SP-25
Inspect & Tested to API 598
Size Ranges from 1 1/2” thru 24”
Pressure Ratings from Class 600 to Class 2500, PN110 to PN420
Structures in Bolted or Pressure Sealed Union Cover
Ends Connections in Flanged R.F or RTJ, Threaded NPT, BSPT, Welded S.W, B.W and Grooved
Body Materials available in Cast Carbon Steel, Low Temp. Carbon Steel, Alloy Steel, Stainless Steel, Monel, Alu. Bronze etc.
Trim Materials available in 13%Cr, F11, F22, SS304, SS304L, SS316, SS316L and other specials.

What are Rubber lined control diaphragm valves

Rubber lined diaphragm valve is a special form of block valve, which appeared in the 1920s. Its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving parts, so it is called diaphragm valve. Its most prominent feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, valve disc and other parts above the diaphragm are not corroded by the medium, the packing sealing structure is omitted, and there is no medium leakage.

Characteristics of rubber lined diaphragm valve

The most prominent feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, valve disc and other parts above the diaphragm are not corroded by the medium, the packing sealing structure is omitted, and the medium leakage will not occur.

• 1. The diaphragm made of soft seals such as rubber or plastic has good sealing performance. Since the diaphragm is a vulnerable part, it should be replaced regularly according to the characteristics of the medium.
• 2. Limited by the diaphragm material, the diaphragm valve is suitable for occasions with low pressure and relatively low temperature.
• 3. Diaphragm valves can be divided into house type, direct flow type, cut-off type, straight through type, ram type and right angle type according to their structural forms; The connection form is usually flange connection; According to the driving mode, it can be divided into manual, electric and pneumatic. Among them, pneumatic drive is divided into normally open, normally closed and reciprocating.
• 4. Generally, it is not suitable for pipelines with temperature higher than 60 ℃ and conveying organic solvents and strong oxidizing media, nor for pipelines with high pressure. The diaphragm valve is 1.3 × The valve used to open or block the air flow in the fluid system of 10-5 ~ 2.5x106pa.

We focus on valves in standard and special materials as customer request.
Our main materials show as the follows:
Any request for other materials, please contact our machinery sales or engineering team on email.

Special Material	Titanium or Titanium alloy series	Titanium (Gr.2,Gr.3,Gr.5,Gr.7,Gr.12)
	Nickel alloy series	Ni6,Ni200,Ni201
		Monel 400,Monel k500
		Inconel 600/625/690/750
		Incoloy 800/825/800H/800HT
		Hastelloy B3/C/C4/C22/C276/G30
	Zirconium alloy series	Zirconium 702/703/705
	Bronze alloy series	Nickel aluminum bronze C95800
	(Super) Duplex Steel	ASTM F51/F53/F55
	Other corrosion resistance	Alloy 20,AISI 321,310,904L
Normal Material	Carbon Steel	WCB,WCC,LCB,LCC,A105N,LF2
	Alloy Material (Low Temperature)	LC1,LC2,LC3,LF3
	Alloy Material (High Temperature)	WC1,WC6,WC9,C5,C12A
	Stainless Steel	CA15,CF8,CF8M,CF3,CF3M

Dimensions of Rubber lined control diaphragm valve

 

DN	15	20	25	32	40	50	65	80	100	125	150	200	250	300
D0	290	290	290	290	290	290	365	365	365	475	475	475	580	580
H1（air-to-open）	479	479	479	538	553	562	754	775	857	952	989	1084	1200	1235
H2 （air-to-close）	532	532	532	617	632	641	855	876	958	1077	1114	1209	1200	1235
L	125	135	145	160	180	210	250	300	350	400	460	570	680	750