DIAPHRAGM VALVE
Flange Type
(1/2"-10"FLG.)

Design Advantages

• Solid thermoplastic body and bonnet for best overall corrosion resistance.
• Large diameter molded in stainless steel diaphragm stud for long life service.
• Fully lubricated brass or cast iron stem and sleeve. Sizes 3" and larger have bonnet grease fitting for ease of in service lubrication.
• Extra heavy EPDM diaphragm or optional PTFE diaphragm fully backed by EPDM, for long service life under the most severe conditions.
• Unique concave/convex PTFE/ EPDM diaphragm design insures PTFE barrier returns to full open position.
• Standard, adjustable full close position over travel stop to eliminate premature diaphragm failure due to overtightening.
• Full stroke, fully protected open/close position indication.
• Stainless steel or plastic encapsulated external hardware.
• Longer service life and higher Cv values than rubber lined valves.
• High pressure, temperature and vacuum service rated, suitable for most applications.
• Can be used in lined, metal FRP or thermoplastic piping systems.
• Flanged application valves designed to fit between ANSI B16.5 Class 150 flanges.

Materials Of Construction

Item	Parts	Pcs	Materials
1	Body	1	PVC, PP, PVDF, CPVC
2	Bonnet	1	PVC, PP, PVDF, CPVC
3	Compressor	1	1/2"-1" PPG+Nylon 1/2"-10" Cast Iron
4	Hand Wheel	1	PP
5	Sleeve	1	1/2"-2" Brass 21/2"-10" Cast Iron
6	Stem	1	1/2"-2" Brass 21/2"-10" SS 41
7	Diaphragm	1	EPDM, HYPALON TEFLON®
8	Cap	1	1/2"-2" Brass 21/2"-10" PVC,PP
9	Compressor Pin	1	SUS-304
10	Name Plate	1	PVC
11	Grease Nipple	1	BRASS
12	Stud Bolt & Nut		SS41, SUS304
13	Inserted Nut		BRASS
14	Bolt Nut & Washer		SS41, SUS304
15	Thrust Bearing	1	Standardized 3" - 10" Used Only
16	Stopper	1	SS-41, BRASS, SUS304
17	Set Nut	1	SS-41, BRASS, SUS304
18	Gauge Cover	1	POLYCARBONATE
19	Sheet Gasket	1	EPDM
20	Sheet Ring	1	SS-41, BRASS,SUS304
21	Spring Washer	1	SS-41, SUS304

VITON® is a trademark of DuPont Performance Elastomers

TEFLON® is a trademark of DuPont Performance Elastomers

Ansi Dimensions

Size Inch	D1	D2	D3	e	No. of Holes	D4	D5	Lift	L	T	H	I
1/2"	0.63	238	3.50	0.63	4	2.32x2.09	3.70	0.51	4.25	0.51	3.98	5.51
3/4"	0.79	276	3.85	0.63	4	2.80x2.48	3.70	0.51	5.90	0.59	4.17	5.98
1"	0.98	313	4.25	0.63	4	3.15x2.60	3.70	0.55	5.90	0.67	4.45	6.22
1 1/2"	1.61	388	5.00	0.63	4	4.95	5.79	0.94	6.95	0.67	5.24	7.60
2"	2.05	474	5.96	0.75	4	5.83	5.79	1.10	7.95	0.67	5.71	8.27
2 1/2"	2.68	549	7.01	0.75	4	7.48	7.95	1.26	9.85	0.79	7.76	10.87
3"	3.07	600	7.52	0.75	4	8.46	7.95	1.34	10.40	0.79	8.50	11.54
4"	3.94	750	9.02	0.75	8	10.04	9.49	2.13	12.95	1.10	10.28	14.57
5"	4.92	850	10.00	0.87	8	12.60	10.79	2.83	16.14	1.10	1213	16.22
6"	5.83	951	10.98	0.87	8	15.16	15.55	2.83	18.90	1.26	13.15	18.54
8"	7.80	11.75	13.50	0.87	8	16.93	15.55	3.78	22.44	1.26	16.40	24.61
10"	9.76	14.25	15.98	0.98	12	21.26	21.85	5.20	26.77	1.34	20.08	29.53

Size Inch	Rubber Diaphragm @ 73°F					Teflon Diaphragm @ 73°F
	UPVC	PP	PPG	CPVC	PVDF	UPVC	PP	PPG	CPVC	PCDF
1/2"	150	150	150	150	150	105	105	105	105	105
3/4"	150	150	150	150	150	105	105	105	105	105
1"	150	150	150	150	150	105	105	105	105	105
1 1/2"	150	150	150	150	150	105	105	105	105	105
2"	150	150	150	150	150	105	105	105	105	105
2 1/2"	150	150	150	150	150	105	105	105	105	105
3"	150	150	150	150	150	90	75	90	90	90
4"	150	150	150	150	150	90	75	90	90	90
5"	105	105	105	105	105	60	60	60	60	60
6"	105	105	105	105	105	60	60	60	60	60
8"	60	60	60	60	60	45	45	45	45	45
10"	60	45	60	60	60	45	45	45	45	45

Testing performed on PVC/PP/EPDM valves at 73°F water temperature, non-shock.

Flanged Body Type 1/2" - 10" Diaphragm Valves

Design Specifications

Thermoplastic Diaphragm Valves  1/2" - 10" Flg.; shall be molded of solid thermoplastic materials for body and bonnet. Body is of the weir configuration exhibiting large flow area and good flow control capability. Body is designed to fit between ANSI B16.5 class 150 flanges. Stem and sleeve shall be brass or cast iron, fully lubricated . Sizes 3" and larger employs a bonnet grease fitting for ease of lubrication. All valves shall have an adjustable overtravel stop in the close position to prevent overtravel and premature diaphragm failure. Full stroke position indication is enclosed in a clear protective cover. All external fasteners shall be either encapsulated in plastic or of stainless steel materials. Materials of construction shall be: (select as required for service)

Body

PVC,CPVC,ASTM D-1784,PP,ASTM D-4101,PVDF, ASTM D-3222

Bonnet

PPO, ASTM D-4101 (standard)
PVC,CPVC,ASTM D-1784,PP,ASTM D-4101,PVDF, ASTM D-3222

Stem/Sleeve

Brass, 1/2" - 2",
C.I., 2 1/2" - 10"

Diaphragm

AEPDM, Ethylene Propylene Diene Monomer
Fluorocarbon, Viton® (DuPont Performance Elastomers) for vacuum service only
PTFE/EPDM, Teflon® (DuPont Performance Elastomers)

Diaphragm Insert Stud

Stainless Steel, Large Diameter

Positive Indicator Cover

PC, Polycarbonate, ASTM - D-2848

Handwheel

ABS, ASTM D-1788

Not recommended for compressed air or gas service.

For more information about our products please go to our Information Request page

Thermoplastic Valves Inc. 53 South Seventh Street Emmaus, PA 18049
610-967-6388 FAX: 610-967-6448 • email: tvi2@fast.net