The Original Double Seat Valve

Semi-conductor, pharmaceutical, Bio-technology, food processing, structural engineering

Everfit Technology CO., LTD. (EFT) is one of the stainless steel pipe fittings manufacturers based in Taiwan with over 36 years of experience. EFT provides 316, 316Ti stainless steel pipe fittings, pipe reducer, eccentric pipe reducer, vacuum pump, valve actuator - ISO, EN11435, DNV, TSSA CRN, BPE, 3-A SSI certified.

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The Original Double Seat Valve | The Original Double Seat Valve

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The Original Double Seat Valve

Double Valve Body Combination

The Original Double Seat Valve

Caution, opening/closing time:

Opening/closing time will be effected by the following:
The air supply(air pressure).
The length and dimensions of the air hose.
Number of valves connected to same air hose.
Use of single solenoid valve for serial connected air
actuator functions.
Product pressure.

Air connections

Compressed air: R1/8"(BSP), internal thread.

Designation

NO	PART NAME	QTY	MATERIAL
1	Piston	1	SUS 304
2	Cyinder	1	SUS 304
3	Spring assembly	1	SUS304
4	O-ring	1	NBR
5	O-ring	1	NBR
6	Bracket	1	SUSB04
7	O-ring	1	NBR
8	O-ring	1	NBR
9	Lock wire clip	1	SUS 304
10	Stop ring	1	PE
11	Clip complete	1	SUS 420
12	Stem	1	SUS 316
13	Seal ring	2	EPDM
14	Middle piece	1	SUS 316
15	Washer	1	SUS 316
16	O-ring	1	O-ring
17	Screws	1	SUS316
18	Lip seal-EPDM	1	EPDM
19	Valve body-upper	1	SUS 316
20	Valve body-lower	1	SUS 316
21	Valve body seal ring	1	EPDM
22	Clamp	2	SUS 304
23	Air connection	1	Cupper
24	Air outlet filter	1	Cupper

Technical Date

Max. product pressure (depending on valve specifications): 1000kpa(10 bar)
Min. product pressure: full vacuum.
Temperature range: 10°C to +140°C(EPDM)
Air pressure: 5 to 7 bar.

Materials

Product wetted steel parts: Steel AISI 316L.
Finish: Semi bright.
Other steel parts: Stainless steel AISI 304.
Plug stem : AISI 316L with hard chrome planted stemm surface.
Product wetted seals: EPDM rubber.
Other seals: NBR.

Ordering

Please state the following when ordering:

Size.
Connections if not welding ends.
Valve body combination.
Actuator function, NC, NO, or A/A.
Options.

Specification

Size	ID mm	OD mm	A0 mm	A1 mm	A2 mm	ØD mm	C mm	E1 mm	E2 mm	t mm	L/Clamp mm	L/SMS Male mm	L/IDF Male mm	L/RJT Male mm
25.4	22.1	25.4	202	14	258	60	55.6	50.5	38	1.65	21.5	19	21.5	21.5
38.1	34.7	38.1	287	25	426	87	80	60	68.5	1.65	21.5	23	21.5	21.5
50.8	47.5	50.8	361	25	454	87	92	68.5	68.5	1.65	21.5	23	21.5	21.5
63.5	60.2	63.5	385	25	493	87	108	79	82	1.65	21.5	27	21.5	21.5
76.1	72.9	76.1	453	32	581	133	128	103.5	103.5	1.65	21.5	27	21.5	21.5
101.6	97.6	101.6	481	32	630	133	148	103.5	103.5	2	21.5	30	30	30