Technical parameters and performances
Body
DN | DN15 20 25 32 40 50 65 80 100 mm | |
PN | PN1.6 4 .0 6.4MPa | |
Flange standard | JB/T79.1-94 79.2-94etc. | |
Body material | Cast iron (HT200), cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2T i) | |
Plug type | Single-seat (P), double-seat (N), sleeve (M) | |
Plug material | Hard seal | Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti) |
Soft seal | Stainless steel embedded with rubber ring | |
Pressure balancing | Stainless steel bellows | |
Flow characteristic | Quick open | |
Working temperature | ≤80℃ | |
Actuator
pressure setting range | 0.4~0.5 5~10 9~14 13~19 18~ 24 22~28 27~33 36~44 42~51 49~58 56~66 |
Diaphragm cover material | Teflon coated A3, A4 steel sheet |
Diaphragm material | NBR, EPR, fluorine rubber, oil resistant rubber |
1 Main valve r | 2 Main valve plug | 3 Main valve actuator | 4 Pressure reducing valve | 5 Throttle valve |
6 Pilot plug | 7 . Detection mechanism | 8 Diaphragm | 9 Preset spring |
Performance
Set value error | ±5% | |
Allowable leakage | Standard type | Class IV (conforming to GB/T4312-92) |
Tight type | Class V I (conforming to GB/T4312-92) | |
Rated flow coefficient, rated travel, performance
30W02-01 nitrogen supply device
DN | 25 | 32 | 40 | 50 | 65 | 80 | 190 | ||||||||
Seat size | 5 | 6 | 7 | 8 | 10 | 12 | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 190 |
Flow coefficient | 0.2 | 0.32 | 0.5 | 0.8 | 1.8 | 2.8 | 4.4 | 6.9 | 11 | 20 | 30 | 48 | 75 | 120 | 25 |
Rated travel | 8 | 10 | 14 | 20 | 25 | ||||||||||
30W02-02 nitrogen discharge device
DN | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 |
Seat size | 20 | 25 | 32 | 40 | 50 | 65 | 81 | 100 |
Flow coefficient | 6.9 | 11 | 20 | 30 | 48 | 75 | 120 | 190 |
Rated travel | 8 | 10 | 14 | 20 | 25 | |||
Working principle
In the nitrogen supply device (see figure 1), the medium at the pressure point at the top of the tank is introduced to the detection mechanism (7) through the pressure pipe. The medium produces an acting force on the detection element, which balances the pre-tightening force of the preset spring (8). When the pressure in the tank drops to be lower than the pressure set point of the nitrogen supply device, the balance is destroyed, so that the pilot plug (6) is opened, and the before-valve gas enters the upper and lower diaphragm chambers of the main valve actuator (3) after passing through the pressure reducing valve (4) and throttle valve (5). The main valve plug (2) is opened and nitrogen is filled into the tank. When the pressure in the tank rises to the pressure set point of the nitrogen supply device, the pilot plug (6) is closed by the preset spring force. Due to the spring action in the main valve actuator the main valve is closed and nitrogen supply is stopped.
The nitrogen discharge device (see figure 2) is an internal feedback mechanism. The medium enters the detection mechanism (2) after passing through the bonnet. The medium produces an acting force on the detection element, which balances the pre-tightening force of the spring (3). When the pressure in the tank rises to be higher than the pressure set point of the nitrogen discharge device, the balance is destroyed, so that the plug (1) moves upward to open the valve and discharge nitrogen to the outside. When the pressure in the tank falls to the pressure set point of the nitrogen discharge device, the valve is
closed by the preset spring force.
