diff --git a/src/service/device_io_control_service.cpp b/src/service/device_io_control_service.cpp
index 28cfdc9..7e84b29 100644
--- a/src/service/device_io_control_service.cpp
+++ b/src/service/device_io_control_service.cpp
@@ -13,8 +13,8 @@ using namespace std;
 -通断电磁阀      3 PC7 5
 #endif
 
-#define GPM_TO_SPEED(gpm)   (gpm * 10)
-#define SPEED_TO_GPM(speed) (speed / 10)
+#define GPM_TO_SPEED(gpm)   (gpm * 14.7)
+#define SPEED_TO_GPM(speed) (speed / 14.7)
 
 DeviceIoControlService::DeviceIoControlService() {}
 void DeviceIoControlService::initialize() { GET_TO_SERVICE(m_zcanHost); }