DUAL-PLATE WAFFER CHECK VALVE
2622
2622
A check valve is a safety component that allows fluid to flow in only one direction and prevents backflow, thereby protecting the system from damage or reduced efficiency. It operates automatically based on medium pressure and is used in heating, plumbing and industrial systems.
| Art. | IDENT | EAN | DN | PN | A [mm] |
C [mm] |
D [mm] |
R [mm] |
Q [mm] |
| CV Waffer HERZ DN40 | 3262254 | 3838963245780 | 40 | 16 | 43 | 91 | 36 | 25.8 | 6.8 |
| CV Waffer HERZ DN50 | 3262255 | 3838963245797 | 50 | 16 | 43 | 107 | 42 | 27 | 8.6 |
| CV Waffer HERZ DN65 | 3262256 | 3838963245803 | 65 | 16 | 46 | 127 | 60 | 35 | 15.2 |
| CV Waffer HERZ DN80 | 3262257 | 3838963245810 | 80 | 16 | 64 | 142 | 66 | 42 | 14.3 |
| CV Waffer HERZ DN100 | 3262258 | 3838963245827 | 100 | 16 | 64 | 162 | 86 | 50 | 22.3 |
| CV Waffer HERZ DN125 | 3262259 | 3838963245834 | 125 | 16 | 70 | 192 | 115 | 64 | 33.7 |
| CV Waffer HERZ DN150 | 3262260 | 3838963245841 | 150 | 16 | 76 | 218 | 143 | 77 | 45.4 |
| CV Waffer HERZ DN200 | 3262261 | 3838963245858 | 200 | 16 | 89 | 273 | 197 | 102.5 | 69.6 |
| CV Waffer HERZ DN250 | 3262262 | 3838963245865 | 250 | 16 | 114 | 328 | 231 | 125 | 74.5 |
Valves of series 3 2622 xx are dual-plate check valves for wafer-type installation, manufactured in accordance with applicable product standards and the quality requirements of EN ISO 9001.
The dual-plate check valve with a stainless steel disc and a grey cast iron body is suitable for heating and cooling (HVAC), water distribution, pumping stations, and various industrial applications. In addition to water installations, these valves can also be used in systems where the medium is a non-hazardous liquid, in accordance with the requirements of the PED 2014/68/EU directive.
The valves can be used in systems with a maximum pressure of up to 16 bar and in a temperature range from –10 °C to +100 °C (without steam). As already mentioned, the valves are designed for wafer installation, and it is important to ensure that the valve is correctly oriented in accordance with the desired flow direction. To open the valve plates in the intended flow direction, a minimum pressure differential of 0.1 bar between the inlet and the outlet is required. The valve can be installed in either a horizontal or vertical position.
The dual-plate check valve with a stainless steel disc and a grey cast iron body is suitable for heating and cooling (HVAC), water distribution, pumping stations, and various industrial applications. In addition to water installations, these valves can also be used in systems where the medium is a non-hazardous liquid, in accordance with the requirements of the PED 2014/68/EU directive.
The valves can be used in systems with a maximum pressure of up to 16 bar and in a temperature range from –10 °C to +100 °C (without steam). As already mentioned, the valves are designed for wafer installation, and it is important to ensure that the valve is correctly oriented in accordance with the desired flow direction. To open the valve plates in the intended flow direction, a minimum pressure differential of 0.1 bar between the inlet and the outlet is required. The valve can be installed in either a horizontal or vertical position.
Operating Data
Medium
Heating water quality must comply with standards ÖNORM H 5195 and VDI 2035. The use of ethylene or propylene glycol in mixing ratios of 25–50% is permitted. EPDM seals are sensitive to mineral oil-based lubricants, which can cause seal damage. When using ethylene glycol-based products for frost and corrosion protection, follow the manufacturer's documentation. Suitable media besides water include non-hazardous liquids in accordance with Directive 2014/68/EU (Pressure Equipment Directive - PED).
Materials Used
- Maximum allowable pressure: PN16 - 16 bar
- Minimum pressure difference for valve plate opening: 0.1 bar
- Operating temperature range: -10 °C to +100 °C (without steam)
- Flanges: according to EN 1092 and ISO 7005 standards
- Valve markings: according to EN 19
Medium
Heating water quality must comply with standards ÖNORM H 5195 and VDI 2035. The use of ethylene or propylene glycol in mixing ratios of 25–50% is permitted. EPDM seals are sensitive to mineral oil-based lubricants, which can cause seal damage. When using ethylene glycol-based products for frost and corrosion protection, follow the manufacturer's documentation. Suitable media besides water include non-hazardous liquids in accordance with Directive 2014/68/EU (Pressure Equipment Directive - PED).
Materials Used
- Body: GG, GJL-250 (EN1561)
- Discs: stainless steel 1.4401 (SS 316)
- Seal: EPDM
- Spring: stainless steel 1.4401 (SS 316)
- Shaft: stainless steel 1.4401 (SS 316)
- Pin: stainless steel 1.4401 (SS 316)
- Sliding washer: PTFE
- Plug: steel
- Plug seal: PTFE
- Eye bolt: steel
Installation and disposal
When installing the valve, lift it using the provided eyebolt. Ensure that the flange's inner diameter allows for full disc movement (see Fig. 1). For horizontal pipelines, position the hinge pin vertically (see Fig. 2). Install the valve in straight pipe sections, away from bends or pumps, to prevent turbulent flow. The valve is unidirectional—always install it in the direction of the flow arrow marked on the body. In vertical downward flow, the springs may not fully close the valve, but this does not affect its functionality.
Figure 1:
Figure 2:
Maintenance and recommendations
Store the valve in a dry, enclosed environment. For maintenance, remove the valve from the pipeline and place it on a flat surface. Remove the hinge pin by taking out the retaining plugs (see Fig. 3). Clean all components and inspect the seals and plates. Reassemble the plates and reinsert the hinge pin, ensuring that the springs are securely positioned. Before any maintenance, allow pipes, valve, and fluid to cool down completely. When handling toxic, corrosive, or flammable fluids, always depressurize and drain the system. Avoid exposure to temperatures above 50°C or below 0°C to prevent damage.
Figure 3:
When installing the valve, lift it using the provided eyebolt. Ensure that the flange's inner diameter allows for full disc movement (see Fig. 1). For horizontal pipelines, position the hinge pin vertically (see Fig. 2). Install the valve in straight pipe sections, away from bends or pumps, to prevent turbulent flow. The valve is unidirectional—always install it in the direction of the flow arrow marked on the body. In vertical downward flow, the springs may not fully close the valve, but this does not affect its functionality.
Figure 1:
Figure 2:
Maintenance and recommendations
Store the valve in a dry, enclosed environment. For maintenance, remove the valve from the pipeline and place it on a flat surface. Remove the hinge pin by taking out the retaining plugs (see Fig. 3). Clean all components and inspect the seals and plates. Reassemble the plates and reinsert the hinge pin, ensuring that the springs are securely positioned. Before any maintenance, allow pipes, valve, and fluid to cool down completely. When handling toxic, corrosive, or flammable fluids, always depressurize and drain the system. Avoid exposure to temperatures above 50°C or below 0°C to prevent damage.
Figure 3:
