High-temperature nitric acid-specific self-regulating valve main technical parameters and installation points

High temperature nitric acid dedicated self-regulating valve relies on the pressure flowing through the valve medium itself, the temperature as an energy-driven valve to work automatically, without external power supply and secondary instrument. Also known as self-control valve. Self-operated pressure regulating valve without external energy, can work in a non-electric gas-free place, both convenient and energy saving. Pressure sub-range of small and cross each other, high precision. The pressure setting can be set continuously during operation. After the valve pressure regulator, the pressure before the valve and the valve pressure ratio of 10: 1 ~ 10: 8. Rubber diaphragm detection, implementing agencies measured high precision, sensitive action. Pressure balance mechanism, so that the control valve responsive and precise control. High-temperature nitric acid-specific self-regulating valve structure High-temperature nitric acid-specific self-regulating valve main technical parameters: Nominal diameter: DN15 ~ 250mm Nominal pressure: PN1.6,2.5,4.0,6.4 MPa Flange standard: ANSI, JIS, DIN, GB, JB (special can be provided by the user) Connection Type: FF RF RTJ, Weld (SW BW), Thread (For 1 "or less) Cover form: standard -17 ~ +450 ℃ Gland type: Bolt compression type Sealed packing: V-type PTFE packing, PTFE impregnated asbestos packing, asbestos textile packing, graphite packing Spool form: single-seat, sleeve-type spool Flow characteristics: linear Effective area (cm): 32 ※ 80 250 630 Pressure setting range (MPa): 0.8 to 1.6 0.1 to 0.6 0.015 to 0.15 0.005 to 0.035 0.3 to 1.2 0.05 to 0.3 0.01 to 0.07 Pressure valve to ensure the normal work of the minimum pressure △ Pmin (MPa): ≥ 0.05 ≥ 0.04 ≥ 0.01 ≥ 0.005 Allow the maximum pressure difference between the upper and lower membrane chamber (MPa): 2.0 1.25 0.4 0.15 Material Membrane cover: steel plate galvanized; diaphragm: EPDM or FKM clamp fiber Control pipe, connector brass or steel 10 × 1; ferrule: R1 / 4 " Note: ※ The pressure setting range for this effective area does not apply to DN150-250. High temperature nitric acid special self-regulating valve Installation points: 1. When the valve is used in gas or low viscosity liquid medium, the ZZY self-operated pressure regulating valve is usually mounted on a horizontal pipe in a vertical direction, and is flip-flipped or bevelled when the space in the position is not allowed. 2. To facilitate on-site maintenance and operation, the regulator should be left around the appropriate space. 3. When the medium is clean gas or liquid, the pre-filter can not be installed. 4. Regulator valve is too large (DN ≥ 100 hours), there should be a fixed bracket to confirm the media is very clean, the pieces 3 may not be installed. 5. When the position is not allowed, bypass valve (manual) can be omitted (we do not recommend). 6. After the valve group according to the needs of users with optional check valve, safety valve and so on. 7. Valve in the steam or high viscosity liquid medium used, usually ZZY-type self-acting pressure regulating valve is installed upside down in the horizontal tube, the condenser (steam with self-force) should be higher than the regulator and the actuator below Valve before and after take over. The condenser should be filled with cold water before use, after about 3 months irrigation time. 【Print】 【Close】