Self-temperature control valve - Jinan Dakota Lihua Machinery Equipment Co.

(1) Description: temperature control valve is a liquid thermal expansion and contraction principle, against the inner bulb to control the flow of liquid fluid volume changes. Control process: temperature volume ΔV = K1 (Δt) stroke volume ΔL = K2 (ΔV) ΔQ = K1K2K3 (Δt) = K (Δt) traffic travel ΔQ = K3 (ΔL) Thus, the control method is simple proportional control ( adjusted P) K is a proportionality factor. (2) Advantages: a, no external power supply b, low cost, c, easy and quick installation. (3) Disadvantages: a, defects principle: only simple ratio adjustment, can not eliminate the static error. b, structural deficiencies: proportional coefficient k is determined by the mechanical structure itself, can not be corrected according to the site conditions. c, process defects: ① production assembly when large environmental temperature and humidity effects can not be precisely controlled spool stroke, only the expense of steady flow adjustment curve to meet flow requirements, valve port easy to wear. ② place to move the actuator stem seal, at a higher temperature working environment, easy to aging, Lou Ye, and easy to dilute rust, causing the actuator stuck. Fourth, the application areas: a heating system or heat exchanger unit heat domestic hot water system c b d conditioning system with hot temperature production process control technology parameters: a, self-temperature control valve body Figure 1. Body 2. Temperature 3. Perform capillary probe assembly 4. 5. 6. thermostat knob signs indicating insulation frame 7. 8. 9. Bell tamponade coupling nut Second, the technical parameters Model nominal diameter KV value m3 / h Dimensions Single side connecting bolts M × L × NLH h M PN16 PN25 DLRV-32-02 DN32 13 180 350 360 G1 〃 M16 × 60 × 4 M16 × 60 × 4 DLRV-40-02 DN40 22 200 550 360 G1 〃 M16 × 60 × 4 M16 × 70 × 4 DLRV-50-02 DN50 30 230 560 360 G1 〃 M16 × 70 × 4 M16 × 70 × 4 DLRV-65-02 DN65 50 290 620 360 G1 〃 M16 × 70 × 4 M16 × 70 × 8 DLRV-80-02 DN80 78 310 650 400 G1 〃 M16 × 70 × 8 M16 × 80 × 8 DLRV-100-02 DN100 120 350 690 400 G1 〃 M16 × 80 × 8 M16 × 80 × 8 DLRV-125-02 DN125 190 400 730 490 G1 〃 M16 × 80 × 8 M22 × 90 × 8 DLRV-150-02 DN150 280 480 780 490 G1 〃 M20 × 80 × 8 M22 × 90 × 8 DLRV-200-02 DN200 400 495 830 490 G1 〃 M22 × 90 × 12 M22 × 100 × 12 DLRV-250-02 DN250 500 622 880 490 G1 〃 M22 × 90 × 12 M27 × 100 × 12 Applicable media: Steam and Hot Water HTF adjustment range: 30 ℃ ~ 110 ℃ capillary length : 4 m Material: ductile iron, steel nominal pressure: PN16, PN25 NOTE: capillary length if there are special requirements, please notice. Do not for direct water supply system. DN15-DN25 need now ordering