ꁆ ꁇ

antipollution check valve, with plugged drain port, union thread

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

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