{"id":29181,"date":"2026-03-19T12:00:45","date_gmt":"2026-03-19T11:00:45","guid":{"rendered":"https:\/\/schuhmacher-tech.de\/product\/domin-s4-pro-direct-acting-servo-valve-iso-s01\/"},"modified":"2026-10-09T21:40:29","modified_gmt":"2026-10-09T19:40:29","slug":"domin-s4-pro-direct-acting-servo-valve-iso-s01","status":"publish","type":"product","link":"https:\/\/schuhmacher-tech.de\/en\/product\/domin-s4-pro-direct-acting-servo-valve-iso-s01\/","title":{"rendered":"Domin S4 Pro \u2013 Direct-acting servo valve ISO S01"},"content":{"rendered":"
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The Domin S4 Pro is the world\u2019s smallest direct-drive servo valve. With a connection circle of just 12.2 mm and a weight of 290 g, it delivers the dynamics and precision of two-stage servo valves \u2013 whilst requiring significantly less maintenance and without the need for external amplifier electronics. Typical applications include robotics, motorsport, aerospace, simulation and compact industrial automation. <\/p>\n<\/div>\n<\/div>\n

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Technical highlights<\/strong><\/p>\n<\/div>\n<\/div>\n

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  • The world\u2019s smallest direct-drive servo valve (ISO 10372 size 01)<\/li>\n
  • Integrated on-board electronics with slide position feedback \u2013 no external amplifier required<\/li>\n
  • Response time under 3 ms, frequency response above 200 Hz (\u201390\u00b0 phase)<\/li>\n
  • Hysteresis, threshold and zero-point offset: all less than 1 per cent<\/li>\n
  • Maximum operating pressure 350 bar (5,000 psi)<\/li>\n
  • Nominal flow rate 0.5 to 18 l\/min (rated at 35 bar \u0394P per control edge)<\/li>\n
  • Power consumption less than 2 W, supply voltage 22\u201330 V DC<\/li>\n
  • Vibration resistance: 35 g (3 axes), shock resistance: 50 g<\/li>\n
  • Choice of three seal materials: nitrile, Viton, FFKM<\/li>\n
  • Mounting interface ISO 10372-01-01, tightening torque 2.5 Nm<\/li>\n<\/ul>\n<\/div>\n<\/div>\n

     <\/p>\n

    Order code:<\/strong> S4 Pro \u2013 [1] \u2013 [2] \u2013 [3] \u2013 [4] \u2013 [5] \u2013 [6] \u2013 [7] \u2013 [8] \u2013 [Custom ID]<\/p>\n

    Example<\/strong>: S4 Pro \u2013 6 \u2013 A \u2013 A \u2013 C \u2013 E \u2013 N \u2013 R \u2013 N
    \n= 6\u2009l\/min \u00b7 Axis Cut \u00b7 \u00b110\u2009V \u00b7 centre position \u00b7 6+PE round plug \u00b7 no enable \u00b7 standard oil \u00b7 nitrile<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    Position<\/th>\nDescription<\/th>\nOptions<\/th>\n<\/tr>\n<\/thead>\n
    [1]<\/td>\nNominal flow rate<\/td>\n0.5 to 18 l\/min (any value, rated at 35 bar \u0394P) \u2013 suffix R for reversed A\/B connections (e.g. 18R)<\/td>\n<\/tr>\n
    [2]<\/td>\nValve overlap<\/td>\nA<\/strong> \u2013 Axis Cut (0% overlap, linear response curve)
    \nD <\/strong>\u2013 Deadband (\u00b110% deadband, no flow in the zero range)
    \nO <\/strong>\u2013 Overlap (\u00b13% overlap, 50% gain at the centre)
    \nX <\/strong>\u2013 Special version available on request<\/td>\n<\/tr>\n
    [3]<\/td>\nControl signal<\/td>\nA<\/strong> \u2013 \u00b110 V |
    \nB<\/strong> \u2013 \u00b120 mA |
    \nC<\/strong> \u2013 4\u201320 mA |
    \nD<\/strong> \u2013 \u00b15 V |
    \nE<\/strong> \u2013 \u00b15 mA |
    \nF<\/strong> \u2013 \u00b110 mA |
    \nG<\/strong> \u2013 \u00b150 mA |
    \nH<\/strong> \u2013 \u00b140 mA |
    \nI<\/strong> \u2013 \u00b125 mA |
    \nX<\/strong> \u2013 Special
    \nCombined input\/output possible (e.g. AC = \u00b110 V input, 4\u201320 mA output)<\/td>\n<\/tr>\n
    [4]<\/td>\nDe-energised position<\/td>\nC <\/strong>\u2013 Centre position (valve returns passively to the neutral position)
    \nX <\/strong>\u2013 Special version available on request<\/td>\n<\/tr>\n
    [5]<\/td>\nElectrical plug<\/td>\nB4<\/strong> \u2013 Flying lead, 4-wire, 300 mm (White = 0 V, Black = +24 V, Green = Input\u2212, Red = Input+)
    \nE <\/strong>\u2013 6+PE circular connector, EN\u2009175201-804 \/ MIL 5015, housing size 14
    \nE4 <\/strong>\u2013 4-pin circular connector, EN 175201-804 \/ MIL 5015, housing size 14
    \nG <\/strong>\u2013 Winchester G4-20P rack-and-panel
    \nX <\/strong>\u2013 Special version on request<\/td>\n<\/tr>\n
    [6]<\/td>\nEnable function<\/td>\nN <\/strong>\u2013 No enable function
    \nY <\/strong>\u2013 Enable mode via voltage input (Drive ON: 9\u201330 V \/ Drive OFF: 0\u20135 V; only with connector E)<\/td>\n<\/tr>\n
    [7]<\/td>\nHydraulic fluid<\/td>\nR \u2013 Hydraulic oil in accordance with DIN 51524, filtered to ISO 4406 18\/16\/13
    \nX <\/strong>\u2013 Special version available on request<\/td>\n<\/tr>\n
    [8]<\/td>\nSealing material<\/td>\nN<\/strong> \u2013 Nitrile NBR (Shore 90) \u2013 standard for mineral oils
    \nV <\/strong>\u2013 Viton FKM (Shore 85) \u2013 increased resistance to high temperatures and chemicals
    \nF <\/strong>\u2013 FFKM (Shore 75) \u2013 highest chemical resistance
    \nX <\/strong>\u2013 special version available on request<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

     <\/p>\n

    Data sheet: https:\/\/domin.com\/datasheet\/s4-pro<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

    The Domin S4 Pro is the world\u2019s smallest direct-drive servo valve. With a connection circle of just 12.2 mm and a weight of 290 g, it delivers the dynamics and precision of two-stage servo valves \u2013 whilst requiring significantly less maintenance and without the need for external amplifier electronics. Typical applications include robotics, motorsport, aerospace,…<\/p>\n","protected":false},"featured_media":28848,"template":"","meta":[],"product_brand":[],"product_cat":[415,418,414],"product_tag":[],"class_list":["post-29181","product","type-product","status-publish","has-post-thumbnail","product_cat-domin-proportional-valve","product_cat-hydraulic-valves","product_cat-proportional-valves","description-off","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/product\/29181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/media\/28848"}],"wp:attachment":[{"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/media?parent=29181"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/product_brand?post=29181"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/product_cat?post=29181"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/schuhmacher-tech.de\/en\/wp-json\/wp\/v2\/product_tag?post=29181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}