Product Features

  • particularly suitable for hot water circulation systems due to very low opening pressure
  • wetted metal parts made from dezincification-free and corrosion-resistant gunmetal, resistant against aggressive water
  • male union thread
  • with plugged drain port
  • with test port
  • controllable check cartridge
  • free from dead spots
  • for any installation position

Standards and Approvals

  • DVGW approval
  • ÖVGW approval
  • SVGW approval
  • KIWA approval
  • BELGAQUA approval
  • plastic parts with KTW and W 270 approval
  • according to DVGW worksheet W 570
  • according to accepted materials list from German environmental agency
  • up to DN 32 soundproofing certification according to DIN EN ISO 3822 Class 1
  • DIN EN 13959
  • ÜA-Reg.-Nr. R-15.2.3-21-17048, WIEN-ZERT

Technical data

  • pressure rating PN 10
  • max. operating temperature 65°C
  • short-term peak temperature 90°C

Part no. DN A1 A2 BS
(mm)		 H1
(mm)		 L1
(mm)		 Zeta ∆ popening
(hpa)		 HS
(mm)		 cv
(m³/h)		 LS
(mm)		 kg
1581G01500 15 G 3/4 G 1/4 27 24 70 4.3 10 37 4.3 70 0.19
1581G02000 20 G 1 G 1/4 34 27 80 3.2 10 44 8.9 80 0.27
1581G02500 25 G 1 1/4 G 1/4 42 32.5 82 2.7 10 54 15 82 0.42
1581G03200 32 G 1 1/2 G 1/4 48 36 87 2.7 10 60 24.8 87 0.47
1581G04000 40 G 1 3/4 G 1/4 54 40.5 95 1.5 10 67 51 95 0.63
1581G05000 50 G 2 3/8 G 1/4 70 47.5 115 2.4 10 82 63.9 115 1.03

fot_pro_per_1581g_sall_ainfs_v1
zei_pro_sch_1581g_sall_ainfs_v1
넳 넲
figure 158 1G

1. particularly suitable for hot water circulation systems due to very low opening pressure
2. wetted metal parts made from dezincification-free and corrosion-resistant gunmetal, resistant against aggressive water
3. male union thread

antipollution check valve, with plugged drain port, union thread