Zero Volume Diaphragm Valves

The ZCD series design features minimal internal volume, a reduced dead volume between the seat and inlet flow path, providing efficient purging of the valve. For maintenance, the seat and diaphragm are replaceable.

View Digital Catalog

FEATURES

By minimizing the dead volume from the seat to the main flow channel while closing the valve, the gas displacement feature becomes excellent.
In order to prevent vacuum closing of the diaphragm and to improve the opening speed, the lift (ASSY) section forcibly lifts the diaphragm.
The lift (ASSY) section can be replaced by the user.

WETTED AREA MATERIAL

SUS316L, SUS316LE (Double melt material)
PCTFE
Cobalt alloy

PRECAUTIONS

The valves are designed to be used under atmospheric pressure. Usage such as under vacuum vessels are not guaranteed.
For high temperature applications, please select appropriate material for air-fittings and tubes to assure proper performance.
* Varies depending on the size.

Product Selection

JUMP TO: Specifications Product Grade Product Code Key Product Selection

Product Details

Specifications
Size		ZCD4Q	ZCD4C
Cv		0.1
Maximum Operating Pressure		142psig(0.98MPa(G))
Wetted Area Volume		0.9cm³
Dead Volume of Bifurcation		0.007cm³ *
Fluid Temperature	PCTFE	-10ºC~+80ºC
	PI	-10ºC~+60ºC
Atmospheric Temperature		-10ºC~+60ºC
Actuation Pressure		-	72.52~101.53psig (0.5~0.7MPa(G))
Leak Rates	Across the Seat He Leak Test Rates	≤ 1×10^-9sccs(≤ 1×10^-10Pa·m³/sec)
	Inboard He Leak Test Rates	≤ 1×10^-9sccs(≤ 1×10^-10Pa·m³/sec)
Cycle Life*	Pneumatic Valve	15,000 cycles	2 million cycles
* Test Condition / Seat material : PCTFE Gas : N2 Pressure : 0.98MPa
Product Grade
Grade		STD	EP
Seat		PCTFE
Body Materials		SUS316L
Surface Roughness		≤ Rz 3.2 µm	≤ Rz 0.7 µm
		≤ Ra 0.5 μm / 20 μin	≤ Ra 0.13 μm / 5 μin
Polish		Mechanical Polish	Electro Polish
Cleaning		Degreasing + Precision cleaning
Packing		Single bagged package	Double bagged package

PRODUCT CODE KEY

Model	Size	Operation	Valve Shape		Connection	Seat Material		Grade + Body Material
ZCD	4	Q	S	-	V	C	-	EP-316L
ZCD: Zero Volume-type diaphragm valve ZCDV: Zero Volume-type diaphragm valve with flow-control (Option)	4: 1/4"	Q: 90° manual C: Normally closed O: Normally open	S: Straight A: Angle L: L-shape B: Branch		V: CVC male VF: CVC female S: Compression W: Butt weld	C: PCTFE		STD-316L: Mechanical Polished + SUS316L EP-316L: Electro Polished + SUS316L

*1 Please contact sales representative for branch