Product Made In Japan
Manufacturer: IHARA SCIENCE CORPORATION
Model: DVKA Series

DVKA Metal Diaphragm Seal Valve（21MPa

Features

DVKA Series Diaphragm Valves are designed compact to be applied for UHP high-pressure services.
Diaphragm made of Co-Ni alloy is mounted to realize highly airtight and high durability.
Oil or Grease-free treatment through precise cleaning on the internal media contact surface.
Assembly and Packaging in the clean room.
An indicator to find Open/Close easily is installed on the handle of the manual valve.
Please let us know when you need High-pressure gas products.

Nominal Size	Size	1/4″
Work Pressure	Pressure	Vac. ~ 21MPa
Work Temperature	Temperature	-10°C ~ +80°C (Manual), -10°C ~ +40°C (Pneumatic)
Cv Value	Value	0.1

(※1) In the case of PCTFE sheet
(※2) In the casef VTF Male connection.

Detected Leak Inner	Leak Rate	≤ 3 x 10^-10 Pa m³/sec
Detected Leak Outer	Leak Rate	≤ 1 x 10^-10 Pa m³/sec
Weight	Weight	270g (Manual), 350g (Automatic)
Internal Volume	Volume	1.0cc
Work Durability	Durability	Over 50,000 (Manual), Over 400,000 (Automatic)

(※3) In the case of VTF Male connection under valve Open.
(※4) In-house Test：21MPa　N2 gas sealed

Materials of Main Parts

	Parts Name	Material
1	Body	316L SS
2	Seat	pctfe’*1’
3	Diaphragm	Co-Ni Alloy
4	Diaphragm Retainer	630 SS
5	Bonnet	304 SS
6	Handle’*2’	Aluminum Alloy
7	Cylinder
8	Cylinder Cover

(※1)PI, PEEK, PFA, etc. are available on option.
(※2)Contact us for Lock Out Tag Out (LOTO) options.

Nomenclature of Part Number

DVKA – ① ② – ③ – ④

Ex）　DVKA – 4VM – NC – EP　[1/4″VTF Male connectin,　Automatic, Normal Close,　Electrolytic polishing]

1. Size

Mark	Size
4	1/4″

2. Connection

Mark	Connection
VM	VTF (Male)
VF	VTF (Female)
D	BI-Lok

3. Operation

Mark	Operation
	Manual
NC	Normal Close
NO	Normal Open

4. Internal Finishing

Mark	Internal Finishing
EP	Electro-Polish (≤ Ra 5 µ inch)
BA	Machining (≤ Ra 10 µ inch)

Dimensions (Manual)

Dimensions （ Pneumatic )