Product Details

Product Description

D633 and D634 series are direct acting valves (DDV) with closed-loop position control of live feedback valve core. This valve is athrottle type flow control valve which can be applied to three-way, four-way and 2x2-way valves. They are suitable for electro-hydraulic position, velocity, pressure or force control systems and other systems requiring high dynamic response. The valve core is driven by a permanent magnet linear force motor, which can flexibly drive the valve core from the spring centering position in two directions. This is one of the advantages of the proportional solenoid valve, which can only produce one-way driving force. A closed-loop valve position control circuit board and a pulse width modulation (PWM) driving circuit are integrated in the valve. The integrated circuit of the valve is a great development characterized by SMD technology with PWM current drive output and 24V power supply.

Advantages of direct acting servo valve:

——Directly driven by permanent magnet linear force motor with high driving power

——No pilot oil source required

——Dynamic performance is not affected by pressure

——Low hysteresis and high resolution

——Low power consumption at and near hydraulic zero
——The standardized valve core position detection signal can be used to obtain the operation of the system and is very beneficial
to the maintenance of the valve

——Electrical zero adjustment

——In case of power failure or cable damage or emergency stop, the valve core will automatically return to its spring centering position without external force.

Technical Parameters

Model... type		D634
Specification for installation with or without drain		ISO 4401-05-05-0-94
Diameter of valve port	mm(in)	11.5(0.45)
Valve specification		Single stage valve, slide valve type with valve sleeve
		Tee, cross or 2 * 2
Driving mode of valve element		Direct drive of permanent magnet linear force motor
Pilot level		nothing
weight	kg(ib)	6.3（13.9）
△ PN = rated flow (± 10%) at 35bar 「 500PSI 」 per throttling edge	l/min(gpm)	60/100（15.8/26.3）
Maximum flow of valve	l/min(gpm)	185（48.8）
Maximum working pressure
Port P、 A 、B	bar(psi)	350（5000）
Port T (internal discharge)	bar(psi)	50（715）
Port T (Y port drain)	bar(psi)	350（5000）
Valve port Y	bar(psi)	Direct return tank
Response time (valve core 0-100% full opening)	ms	≤20
Resolving power	%	＜0.1
Hysteresis loop	%	＜0.2
Zero drift (△ t = 55k)	%	＜1.5
Maximum zero leakage (zero opening)	l/min(gpm)	1.2/2.0（0.26/0.43）

Related products

Packing&Shipping

In order to ensure that the product is not damaged during transportation, we will choose to use high-hardness cardboard boxes or wooden boxes to package the product according to the volume of the product, and adopt protective measures such as foamanti-collision and wooden frame fixing to ensure the safe and non-destructive delivery of the goods to the greatest extent.

Company Introduction

Service providers in the industrial sector

Contacts: Marie Cheung

Telephone: +8613729884993 (Wechat Synchronization)

E-mail: marketing@szouhang.com

Zip:518125
Address:Buildings 32,Third industrial zone, houting,Shajing,Bao'an District,

Shenzhen, China (Mainland)

Contact Supplier