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3.5 MPa / 7.0 MPa High Pressure Coolant Valve VNH Series (VNH311A-20A-5DZ)

SMC

A coolant valve for use in high speed grinding and long drill machining.
[Features]
· Suitable for lubrication, blowing away dust and cooling via high pressure coolant (3.5 MPa / 7.0 MPa).
· Thread type: Rc/G/NPT/NPTF.
· Connection port size: 3/8, 1/2, 3/4, 1.
· Number of ports: 2 ports, 3 ports.
· Seal materials: FKM/NBR.

(i)Caution

Webpages for products currently without individual pages on this site will be released on an ad-hoc basis.
Refer to the manufacturer's catalog for specification and material details.
Product images may be representative images. Refer to the manufacturer's catalog for shape details.

Part Number

Configured Part Number is shown.

VNH311A-20A-5DZ

Product Specifications
Part Numbers
Catalog

3.5 MPa / 7.0 MPa High Pressure Coolant Valve VNH Series Specifications

VNH Series: 3.5 MPa external appearance

VNH Series: 7.0 MPa external appearance

Model		3 Port Valve								2-port valve
Model		VNH111A-10A VNH111B-10A	VNH211A-15A VNH211B-15A	VNH311A-20A VNH311B-20A	VNH411A-25A VNH411B-25A	VNH113A-10A VNH113B-10A	VNH213A-15A VNH213B-15A	VNH313A-20A VNH313B-20A	VNH413A-25A VNH413B-25A	VNH113A-10A VNH113B-10A	VNH223A-15A VNH223B-15A	VNH333A-20A VNH333B-20A	VNH433A-25A VNH433B-25A
Applicable Fluid Pressure		0 to 3.5 MPa				0 to 7.0 MPa
Fluid (Main Piping)		Coolant ^*2
Operating Method		External pilot solenoid type / air operated type
Operating Fluid Temperature	VNH□□1A VNH□□3A	^1-5 to +60°C / ^1-5 to +60°C (NBR seal)
Operating Fluid Temperature	VNH□□1B VNH□□3B	^1-5 to +60°C / ^1-5 to +99°C (FKM seal)
Pilot Air	Pressure	0.25 to 0.7 MPa
	Temperature	^*1: -5 to +50℃
	Lubrication	Not required (if lubricating, use turbine oil class 1 ISO VG32)
Proof Pressure		5.5 MPa				10.5 MPa
Ambient Temperature		^*1: -5 to +50℃
Maximum Operating Frequency		20 times/min
Mounting Orientation		Vertical facing up
Piping Connection Port Diameter		3/8	1/2	3/4	1	3/8	1/2	3/4	1	3/8	1/2	3/4	1
Orifice Diameter [mm]		ø7.1 mm or equivalent	ø8.7 mm or equivalent	ø10.6 mm or equivalent	ø14.3 mm or equivalent	ø3.9 mm or equivalent	ø5.2 mm or equivalent	ø6.2 mm or equivalent	ø7.3 mm or equivalent	ø8 mm	ø9.5 mm	ø13 mm	ø15.7 mm
Flow Rate Characteristics	Kv	1.6	3.1	3.9	6.8	0.5	1.0	1.4	2.1	1.9	2.7	5.0	7.5
Flow Rate Characteristics	Conversion Cv	1.9	3.6	4.5	7.8	0.6	1.2	1.6	2.4	2.2	3.1	5.8	8.7
Pilot Connection Port Diameter		1/8		1/4		1/8		1/4		1/8		1/4
Weight (kg)		2	3.1	5.6	8.2	2	3.1	5.6	8.2	2	3.1	5.6	8.2
Face-to-Face Dimensions [mm]		60	80	100	115	60	80	100	115	60	80	100	115

*1 No freezing.
*2: This product cannot be used for water.

Pilot Solenoid Valve Specifications

Pilot Solenoid Valve			VO307-□D1(-Q) VO307-□DZ1(-Q)
Electrical Entry			DIN Terminal
Coil Rated Voltage (V)	AC (50/60 Hz)		100 V, 200 V, other (semi-standard)
Coil Rated Voltage (V)	DC		24 V, other (semi-standard)
Allowable Voltage Fluctuation			-15 to +10% of rated voltage
Temperature rise value			50℃ or less (when rated voltage is applied)
Apparent Power	AC	Inrush	12.7 VA (50 Hz), 10.7 VA (60 Hz)
Apparent Power	AC	Holding	7.6 VA (50 Hz), 5.4 VA (60 Hz)
Current Consumption (DC)			4 W (without indicator light), 4.2 W (with indicator light)
Manual Operation			Non-locking push type

*: See p. 628 in SMC catalog for information on ordering pilot solenoid valves.

Product JIS Symbol

Air-operated type / 3 port JIS symbol

Air-operated type / 2 port JIS symbol

External pilot solenoid type / 3 port JIS symbol

External pilot solenoid type / 2 port JIS symbol

Product Dimensions

(Units: mm)

VNH Series dimensional drawing

(Units: mm)

Model	Main Port 1, 2, 3		Pilot Port 12 (P1), 10 (P2)	A	B^*	C	D	E	F	G	H	I
Model	2 Port	3 Port	Pilot Port 12 (P1), 10 (P2)	A	B^*	C	D	E	F	G	H	I
VNH1□□A-10A VNH1□□B-10A	2 × 3/8	3 × 3/8	1/8	60	217 (219)	60	46	34	24	135	50	77
VNH2□□A-15A VNH2□□B-15A	2 × 1/2	3 × 1/2	1/8	80	246.5 (248.5)	77	60	40	36	164.5	60	95.5
VNH3□□A-20A VNH3□□B-20A	2 × 3/4	3 × 3/4	1/4	100	282 (284)	96	76	50	41	200	79	111
VNH4□□A-25A VNH4□□B-25A	2 × 1	3 × 1	1/4	115	301 (303)	113	85	60	50	219	90	119

*The dimensions in ( ) are for CE compliant products (-Q).

(Units: mm)

Model	J	K	L	M	N	O	P	Q	R	S	T	U
VNH1□□A-10A VNH1□□B-10A	-	29	25	30	37	75	88	36	10.5	62	6 × 8	M5 × 0.8 depth 5.5
VNH2□□A-15A VNH2□□B-15A	20	36	30	40	43	100	118	44.4	16	70	7 × 10	M6 × 1 depth 6
VNH3□□A-20A VNH3□□B-20A	24	48	35	50	50.5	126	148	57.7	19.5	92	9 × 12	M8 × 1.25 depth 6
VNH4□□A-25A VNH4□□B-25A	24	51	38	56	58.5	141	163	66.4	15.5	109	9 × 12	M8 × 1.25 depth 6

Product Diagram

VNH Series 3 port valve diagram

VNH Series 2 port valve diagram

Component Parts

Number	Part Name	Material	Notes
1	Body	Cast iron	Plated
2	Undercover	Cast iron	Plated
3	Cover	Aluminum alloy	-
4	Plate	Iron	-
5	Valve A	Stainless steel	-
6	Valve B	Stainless steel	-
7	Piston	Aluminum alloy	-
8	Return Spring	Piano wire	-
9	Valve Seat	Stainless steel	-
10	Rod	Stainless steel	-
11	Parallel Pin	Stainless steel	-
12	Pilot Solenoid Valve	-

Operating Principle

When pilot solenoid valve 12 is not energized, valve A5 linked to piston 7 is closed via the action of the return spring 8. At this point valve B6 which is connected to valve A5 opens.
When pilot solenoid valve 12 is energized (or when pressurized air enters through port 12 (P1) of the air operated type), the pilot air supplied under piston 7 moves the piston upward, simultaneously opening valve A5 and closing valve B6.

Precautions

*Use heat resistant parts for fittings and tubing when using high temperature fluids. (Compression fittings, fluorine resin tubes, copper piping, etc.)
*Be sure to read the individual product precautions before use.
*See the SMC catalog for product information other than the above.

: 30; 45; 60

Part Number
VNH311A-20A-5DZ

Part Number	Standard Unit Price	Minimum order quantity	Volume Discount	Days to Ship	Type	Applicable Fluid	Operating Environment	Switching Type	Connection Type	Plumbing Thread Nominal	Driving Type	Orifice Dia. (Ø)	Operating Temperature Range (°C)	Number of Solenoids	Application	Voltage	Sealing materials	Option	Body material	Bracket	Functions	CE compliant	Lead wire electrical entry	Number of ports	Types of Related components
	SGD 1,627.85	1 Piece(s)		32 Day(s)	Electromagnetic Type	Coolant	Standard	Normally Closed	[Rc (R)] Rc	3/4	Pilot Type	10.6	-5～50	Single Solenoid	Single Item	24 V DC	NBR	3 Port	Cast iron	None	None	-	DIN terminal with light and surge voltage suppressor	-	-

Please check the type/dimensions/specifications of the part VNH311A-20A-5DZ in the 3.5 MPa / 7.0 MPa High Pressure Coolant Valve VNH Series series.

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1 Part Numbers

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Completed

Specification/Dimensions

CE compliant
- CE-compliant product
- Not compatible
Clear
Number of ports
- 2 ports
- 3 ports
Clear
Types of Related components
- Bracket (with bolt and washer)
Clear
type
- VNH
Clear
Type
- Electromagnetic Type
- Air Operating Type
- Related Components
  - Related components
Clear
Applicable Fluid
- Coolant
Clear
Operating Environment
- Standard
Clear
Switching Type
- Normally Closed
Clear
Connection Type
- Rc (R)
  - Rc
- G
- NPT
- NPTF
Clear
Plumbing Thread Nominal
3/8

1/2

3/4

1
Clear
Driving Type
- Pilot Type
Clear
Orifice Dia.(Ø)
3.9

5.2

6.2

7.1

8

8.7

9.5

10.6

13

14.3

Equivalent to 14.3

15.7
Clear
Voltage
- 24 V DC
- 100 V AC
- 110 V AC
- 200 V AC
- 220 V AC
Clear
Sealing materials
- FKM
- NBR
Clear
Option
- 2 Port
- 3 Port
Clear
Body material
- Cast iron
Clear
Bracket
- Included
- None
Clear
Functions
CE compliant product

None
Clear
Lead wire electrical entry
- DIN terminal
- DIN terminal with light and surge voltage suppressor
- None
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

32 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Similar Part Numbers

Part Number
VNH111A-10A-2DZ
VNH111A-10A-5DZ
VNH111A-N10A-5D-B
VNH311A-20A-5DZ-B
VNH311B-20A
VNH311B-20A-1D

Standard Unit Price	Minimum order quantity	Days to Ship	Type	Applicable Fluid	Operating Environment	Switching Type	Connection Type	Plumbing Thread Nominal	Driving Type	Orifice Dia. (Ø)	Operating Temperature Range (°C)	Number of Solenoids	Application	Voltage	Sealing materials	Option	Body material	Bracket	Functions	CE compliant	Lead wire electrical entry	Number of ports	Types of Related components
-	1 Piece(s)	Quote	Electromagnetic Type	Coolant	Standard	Normally Closed	[Rc (R)] Rc	3/8	Pilot Type	7.1	-5～50	Single Solenoid	Single Item	200 V AC	NBR	-	Cast iron	None	-	Not compatible	-	3 ports	-
SGD 1,088.38	1 Piece(s)	32 Day(s)	Electromagnetic Type	Coolant	Standard	Normally Closed	[Rc (R)] Rc	3/8	Pilot Type	7.1	-5～50	Single Solenoid	Single Item	24 V DC	NBR	3 Port	Cast iron	None	None	-	DIN terminal with light and surge voltage suppressor	-	-
-	1 Piece(s)	Quote	Electromagnetic Type	Coolant	Standard	Normally Closed	NPT	3/8	Pilot Type	7.1	-5～50	Single Solenoid	Single Item	-	NBR	-	Cast iron	Included	-	Not compatible	DIN terminal	3 ports	-
SGD 1,684.90	1 Piece(s)	32 Day(s)	Electromagnetic Type	Coolant	Standard	Normally Closed	[Rc (R)] Rc	3/4	Pilot Type	10.6	-5～50	Single Solenoid	Single Item	24 V DC	NBR	3 Port	Cast iron	Included	None	-	DIN terminal with light and surge voltage suppressor	-	-
SGD 1,596.12	1 Piece(s)	32 Day(s)	Air Operating Type	Coolant	Standard	Normally Closed	[Rc (R)] Rc	3/4	Pilot Type	10.6	-5～50	Single Solenoid	Single Item	-	FKM	3 Port	Cast iron	None	None	-	None	-	-
-	1 Piece(s)	Quote	Electromagnetic Type	Coolant	Standard	Normally Closed	[Rc (R)] Rc	3/4	Pilot Type	10.6	-5～50	Single Solenoid	Single Item	100 V AC	FKM	-	Cast iron	None	-	Not compatible	DIN terminal	3 ports	-

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3.5 MPa / 7.0 MPa High Pressure Coolant Valve VNH Series (VNH311A-20A-5DZ)

(i)Caution

3.5 MPa / 7.0 MPa High Pressure Coolant Valve VNH Series Specifications

Pilot Solenoid Valve Specifications

Product JIS Symbol

Product Dimensions

Product Diagram

Component Parts

Operating Principle

Precautions

Configure

Specification/Dimensions

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