Nymet valves

World Leader in Design and Production of Customised OEM Valves

Solenoid Valve 20 : SERIES V 1” BSP Inlet (Manifold) - 1” BSP Outlet (Female)

Detailed Technical Specifications. Please click onto a category from the vertical menu to view details

  • Functional Requirements
  • Ambient Conditions
  • Inlet and Outlet Configurations
  • Markings
  • Valve Performance
  • Electrical
  • Pressure Loss V's Flow Rate

Functional Requirements

  • Standard piping configurations are made to the inlet of the valve by connecting via the 1” BSP /NPT barrel union assembly. The piping connections to the outlet of the valve are made via a 1” BSP / NPT Female thread connection. This product has been designed to meet all requirements enabling it to be connected to a mains water supply provided it meets the Hydraulic Performance Criteria stated in this specification.
  • The amount of flow can be adjusted through the inbuilt flow control handle.
  • The valve has an inbuilt manual over-ride function enabling it to be operated without applying electrical current to the solenoid.
  • This valve has been designed so as to be able to connect several valves together in parallel without the need for additional connection fittings. Not only does this design provide greater reliability but in addition reduces overall space and capital cost. The design easily allows for disconnection and removal from the installation.
  • For best performance especially at low pressures, the valve should be mounted in a horizontal position with the solenoid standing in an upright position.
  • Standard electrical connections are made through the following options:
    • Though single or double insulated leads. The leads are 0.75mm 2 tin plated conductors.

Standard lead length is 300mm, however any specific customer requirement can be met.

Ambient Conditions

The valve will operate correctly within the following temperature conditions;

  • Ambient temperature: 2° C to 60°
  • Relative humidity : 0% to 100%
  • Temperature of water: 2° C to 80° C

Inlet and Outlet Configurations

Inlet
1” BSP /NPT Barrel Union Assembly
Outlet
1” BSP /NPT Female thread connection (AS1722)

Markings

The following are clearly visible

  • The manufacturers name
  • Model type number
  • Nominal voltage, frequency, and power rating
  • Date of manufacture Code
  • Direction of flow arrow

Valve Performance

Resistance to bursting pressure

Minimum static bursting pressure > 6.5 Mpa (65 bar), reached through a gradual pressure increase spread over 20 seconds starting from atmospheric pressure.

Resistance to external pressure peaks (water hammer peaks)

The valve will withstand 100 cycles of 5.0 Mpa transient peaks (peak width of 200ms)

 Strength of coupling thread

With a minimum of 5 full threads engaged, the inlet and outlet coupling threads do not strip or break when subjected to a tightening torque of 50Nm.

Potable water contact

All non-metallic materials in contact with water have potable water certification to  AS4020, and/or BS6920 parts 1&2, and/or current approvals with FDA & WRC.

All metallic materials in contact with water, comply with AS4020, or contain not more than 4.5% lead (0.1% lead for solders) and 0.05% cadmium.

Corrosion resistance of stainless steels

The stainless steels pass the salt spray fog test according to ASTM B 117 salt spray fog test. Stay time 100 hours. After having been dried in ambient temperatures, there are no rust spots present. A small yellow discolouration is acceptable.

 Solenoid resistance to fire

Solenoid coil former and encapsulant are rated to UL94 – V0 and/or Glow wire-        
IEC 695-2-1, 960° C

Resistance to arc tracking / earth leakage

Solenoid assemblies are flash tested to 3.3 – 3.5kV ac, 50 Hz between earthed parts and live parts of opposite polarity.

Operating pressure range

The valve operates correctly between 70 Kpa and 1250kPa (0.07 – 12.5 bar), at the inlet of the valve.
The pressure is regulated by the available energy of the solenoid coil to lift the internal plunger mechanism.

 Opening pressure drop

The valve is designed to comply with IEC730-2-8 clause 18.101.3

 Operating Pressure Rise (Water Hammer Peak)

Static Pressure ranges = 70 kPa to 1250kPa
Supply pipe velocity range =1.2 m/s to 6.5 m/s
Immediately after closure, the pressure peak is not to exceed 115% of the initial static pressure condition.

 Opening Response Time

Flow established within 0.5 sec of power application

 Closing Response Time

Within 0.5 sec after power is removed

Leaking under pressure

Max seepage admitted in the whole of the pressure range is 10ml/12 Hours

 Abnormal pressure conditions

In certain installations there is the possibility of trapped excess pressure in the line between the valve inlet and supply inlet. This condition may arise when other valves or taps shut off and cause transient high pressure peaks through out the plumbing system.

The valve will open in the following adverse condition:
Rated voltage      -10% 
Coil temperature = 25 ± 5° C prior to power on
Trapped pressure released = up to 2000kPa (20 bar)

Electrical

Voltage

Voltage
Tolerance
%

Frequency
Hz

Power
Consumption
VA

Holding
Curren
mA

Inrush
Current
mA

Ambient
Temp
°C

Water
Temp
°C

Duty Cycle
min on /
min off

24Vac

+10 / -10

50

4.5

180

250

60

60

continuous

30

80

continuous

60

80

3/15

Voltage

Voltage
Tolerance
%

Frequency
Hz

Power
Consumption
VA

Puls

Width

(ms)

 

Ambient
Temp
°C

Water
Temp
°C

Duty Cycle
min on /
min off

4-9VDc

Latching

 

-

3-11

20-40

-

60

60

continuous

30

80

continuous

60

80

continuous

Pressure Loss V's Flow Rate

Pressure Loss V's Flow Rate