Servo Directional Valve 4WS2EM10-5X/90B11XHET210K31EV-100 - Bosch Rexroth R901370776

When an axis runs in closed-loop control and the machine also sits in an area with a risk of gas explosion, the approval of the valve shapes the whole layout of the system. The servo directional valve 4WS2EM10-5X/90B11XHET210K31EV-100 covers both sides: a nominal flow of 90 l/min at 350 bar operating pressure, plus a release for II 1G under Directive 2014/34/EU, documented by the Ex TR type examination certificate under CCC-Ex.

Benefits

• Direct actuation in size 10 with 90 l/min nominal flow and up to 180 l/min maximum flow.
• 350 bar maximum operating pressure as listed by the manufacturer for this material number.
• Explosion protection from the factory for equipment group II 1G under Directive 2014/34/EU, plus CCC-Ex with an Ex TR type examination certificate.
• Four switching positions with internal pilot oil supply and internal pilot oil return, so no separate pilot circuit is needed.
• FKM seals matched to hydraulic fluid HL.
• Connection diagram ISO 4401-05-05-0-05 for subplate mounting, so the valve fits existing size 10 manifolds at a weight of 3.82 kg.

Applications

Test rigs, presses and positioning axes with a continuously corrected flow are the usual place for this valve. The release for equipment group II 1G allows installation where only certified equipment may be used. Because the control electronics sit outside the valve, it fits into an existing controller concept that issues the command value as an analog 30 mA signal.

Manufacturer

The manufacturer is Bosch Rexroth. Material number R901370776 identifies exactly this build, 4WS2EM10-5X/90B11XHET210K31EV-100 with FKM seals and a 7-pole connector.