Malleable cast iron union (Flat / taper seat) is a detachable fitting with both female threaded connections. It consists of a tail or male part, a head or female part, and a union nut, with flat seat or taper seat.
|Size||A (mm)||Type||Ref. No.|
|1/4″ / DN8 / 13.5mm||42||Flat seat / taper seat||M3801 (FM)|
|3/8″ / DN10 / 17.2mm||45||Flat seat / taper seat||M3802 (FM)|
|1/2″ / DN15 / 21.3mm||48||Flat seat / taper seat||M3803 (FM)|
|3/4″ / DN20 / 26.9mm||52||Flat seat / taper seat||M3804 (FM)|
|1″ / DN25 / 33.7mm||58||Flat seat / taper seat||M3805 (FM)|
|1-1/4″ / DN32 / 42.4mm||65||Flat seat / taper seat||M3806 (FM)|
|1-1/2″ / DN40 / 48.3mm||70||Flat seat / taper seat||M3807 (FM)|
|2″ / DN50 / 60.3mm||78||Flat seat / taper seat||M3808 (FM)|
|2-1/2″ / DN65 / 76.1mm||85||Flat seat / taper seat||M3809 (FM)|
|3″ / DN80 / 88.9mm||95||Flat seat / taper seat||M3810 (FM)|
|4″ / DN100 / 114.3mm||100||Flat seat / taper seat||M3811 (FM)|
|6″ / DN150 / 165.1mm||144||Flat seat / taper seat||M3813 (ISO)|
1. For flat seat, it must be fitted together with gasket for sealing, and TPMC could supply rubber gasket separately.
2. For taper (conical) seat, it is self-sealing without gasket.
3. For taper seat material of head and tail, it is malleable iron, and also available with both brass rings as customized.
4. NSF 61 certificate is available for M3803 ~ M3811, except M3801, M3802, M3813.