133-4-72 FRG/2MB DA 1'' 133-015 133-046 133-136 Flange DN25 PN16 DN25 133-136 Female Thread G1 DN25 133-3018 SIGMA N PQR4N 233-12-4-72 CTR1500/5A Direxi 1000 position 5, drawing No.219686 ;Seal for valve body-cover position 2, drawing No.219686 ;Closing assembly for Schlumberger check valve position 29, drawing No.219457;Seal for valve body-cover position 3, drawing No.219457;Closing assembly for disk-type check vavle position 29, drawing No.219451;Seal for valve body-cover