Dual plate check valves wafer type PN 10 & 16

Valvotubi dual plate check valve art.805
Article: 805

Connections suitable with flanges UNI EN 1092-1 PN 10 - 16
Standard API 594
Face to face length: EN 558-1 serie 16, API 609 BS 3135
Installation: horizontal / vertical with down-up flow direction. In horizontal position, the axis must be placed in vertical position. In vertical position, the plates must be opened in the same flow direction. Downstream, a piping of minimum length 5 times diameter, to be installed before the valve, and a pipe of minimum length 2 times diameter after the valve, to allow stabilization of flow and recovery. Installation between counterflanges.
APPLICATIONS ° Water supply ° Heating – conditioning systems ° Pumping stations ° Waste water treatment plants ° Irrigation
- Fig 805: GG/GGG/NBR
- Fig 805I: GG/316/NBR
- Fig 805C: GG/Al Bz / NBR


Epoxy paiting suitable for drinking water applications.

The dual plate check valves wafer type are a compact kind of check valve. With a small face to face length and being wafer type, these dual plate check valves can be mounted directly between flanges and in accordance to many standard connections. The body is made in one piece only, in cast iron with disc in ductile iron, stainless steel or Al-bronze and spring in stainless steel, these parameters allow the dual plate check valves to be applied for several applications. The automatic mechanism of plate opening grants low water losses, and the spring avoids fluid hammer effect. Epoxy coated inside and outside, these check valves are suitable for potable water.

Materials
body  cast iron GG25, EN-GJL-250
spring stainless steel 316
disc  ductile iron GGG40 / st.st. 316 / Al Bz
body seats NBR - EPDM
painting epoxy
 
DN H mm. D mm. Weight kg.
 40  43  94  1
 50  43  109  1.5
 65  46  129  2
 80  64  144  3.5
 100  64  164  4
 125  70  194  5.5
 150  76  220  8.5
 200  89  275  14
 250  114  330  24.5
 300  114  380  33
 350  127  440  47
 400  140  491  60
500  152  620 98.5
600  178  695 160
DN Nominal pressure Test pressure Mpa Max working pressure Mpa
mm BAR body seat 120°C
40-600 16 2,4 1,76 1,6