diff --git a/tcl/drivers/hepump.tcl b/tcl/drivers/hepump.tcl
index 8690a4a..082418a 100644
--- a/tcl/drivers/hepump.tcl
+++ b/tcl/drivers/hepump.tcl
@@ -146,7 +146,7 @@ proc hepump::set_calib {} {
     } else {
       hsetprop [sct]/[sct @motname] group "hepump valve motor"
     }
-    set f 0.5
+    set f 0.55
   } elseif {$pumpcode == 3} { # other
     hsetprop [sct]/[sct @motname] group "hepump valve motor"
     set f [hval [sct]/calib]