Bidirectional. (Can operate with gas/liquid flowing in either direction.)Can close tight with refrigerant flowing in either direction.Will operate on R410a refrigerant 35bar MOP, 30bar max pressure difference300 x 1/4 copper solder connection. (Minimum Kv = 0.21m3/h)300 x 1/2 copper solder connection. (Minimum Kv = 1.18m3/h)600 x AC24v coils with wire tails to suit above selected valves.Normally open if possible. (Advise which you can supply) Optional extra cost if applicable.Door to door delivery to Melbourne Australia. (Not to the airport.)Lead time (Days) Warranty terms Show More