anchor.diff:  	desc = "A pipe with a valve that can be used to disable flow of gas through it."
   
   	can_unwrench = TRUE
  +	interaction_flags_machine = INTERACT_MACHINE_OFFLINE | INTERACT_MACHINE_OPEN		//Intentionally no allow_silicon flag
   
   	var/frequency = 0
   	var/id = null
  
positive.code: 	icon_state = "dvalve_map"
  	valve_type = "d"
  	pipe_state = "dvalve"
  	
  /obj/machinery/atmospherics/components/binary/valve/digital/layer1
  	piping_layer = PIPING_LAYER_MIN
  
negative.code: 	else if(dir==WEST)
  		setDir(EAST)
  
  /obj/machinery/atmospherics/components/binary/valve/interact(mob/user)
  	add_fingerprint(usr)
  	update_icon_nopipes(1)
  	if(switching)
  