Overview
The NK300S is a (re)filling combination valve that contains an integrated pressure reducing valve, strainer, double check backflow preventer with air vent (to protect potable water supply against back flow of heating water into supply pipe), two shut-off ball valves, pressure gauge, and conveniently located test ports for easy inspections and check out. All the needed devices for refilling a heating system are contained.
Features
- Optimal protection of the potable water supply system
- Pressure reducing valve with inlet pressure balancing - inlet pressure fluctuation does not influence the outlet pressure
- Outlet pressure adjustable and directly visible on the pressure gauge
- Low maintenance effort - cartridge insert and valve insert are completely replaceable
Product Specifications
- Application
- Combination (re)filling valve that contains an integrated pressure reducing valve
- Maximum Safe Operating Pressure (psi)
- 150 psi
- Maximum Safe Operating Pressure (kPa)
- 1034 kPa
- Includes
- Boiler fill shut off valve, double check backflow preventer with air vent and discharge connection, valve cartridge, integrated 200 micron strainer, a check valve, pressure reducing valve with valve insert, adjustment spring, and pressure gauge
- Weight (lb)
- 4 lb
- Weight (kg)
- 1.8 kg
- Item Type
- Product
- Approvals, Others
- ASSE 1081
- Ambient Temperature Range (C)
- 1 C to 60 C
- Ambient Temperature Range (F)
- 33 F to 140 F
- Connection Type
- Includes union press fitting connections
- Pressure Range (psi)
- 10 to 58 psi
- Minimum flow rate (gpm)
- 16 gpm @ 22 psi pressure fall-off
- Pipe Size (inch)
- 1/2 in.
- Pipe Size (DN)
- Dn 15
- Fluid Temperature (C)
- Maximum 82 C
- Fluid Temperature (F)
- Maximum 180 F
- Maximum Differential Pressure Ratings (Close-off) (psi)
- 14.5 psi minimum (inlet to outlet)
- Valve Type
- Fast Fill
- Controlled Fluid
- Water
- Materials (Body)
- Brass
- Minimum flow rate (lpm)
- 60 l/min @ 1.5 bar pressure fall-off
- Materials (Diaphragm)
- Fiber-reinforced EPDM
- Materials (Interior parts)
- Stainless steel fine filter mesh filter
- Outlet Pressure Adjustment Range (psi)
- Factory set at 15 psi (1 bar)
- Max. Inlet Pressure Rating (psi)
- 150 psi (10.3 bar)
- Approvals, ASSE
- 1081 Listed
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