Self-Operated Temperature Control Valve
1. Product Overview
The self-operated temperature control valve consists of two core parts: a temperature sensor and a control valve. It is an energy-saving automatic regulating product that requires no external energy supply and operates solely by sensing temperature changes of the controlled medium.
This valve is widely used for automatic temperature control of heat exchangers with various media such as gas, steam, hot water and thermal oil. It features a wide adjustable temperature range, continuous and convenient temperature setting, and over-temperature overload protection. It is extensively applied in urban heating systems, heating engineering, power plants, petroleum, metallurgy, pharmaceutical manufacturing, boiler systems and other industrial fields.
2. Main Component Materials
Component Name | Material Option 1 | Material Option 2 |
Valve Body | ZG230—45 (Cast Carbon Steel) | ZG1Cr18Ni9Ti (304 Stainless Steel) |
Valve Seat | ZG1Cr18Ni12Mo2Ti (316 Stainless Steel) | Cr18Ni12Mo2Ti (316 Stainless Steel) |
Valve Plug | 1Cr18Ni9Ti (304 Stainless Steel) | Cr18Ni12Mo2Ti (316 Stainless Steel) |
Bellows Sleeve | 1Cr18Ni9Ti (304 Stainless Steel) | Cr18Ni12Mo2Ti (316 Stainless Steel) |
Balanced Bellows | 1Cr18Ni9Ti (304 Stainless Steel) | — |
Temperature Bulb | H62 Brass | 1Cr18Ni9Ti (304 Stainless Steel) |
Capillary Tube | H62 Brass | 1Cr18Ni9Ti (304 Stainless Steel) |
Connector | 35# Carbon Steel | 1Cr18Ni9Ti (304 Stainless Steel) |
3. Main Technical Parameters
Parameter Item | Specification |
Nominal Diameter DN (mm) | 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250 |
Nominal Pressure PN (MPa) | 1.6, 4.0 |
Rated Stroke (mm) | 6, 8, 10, 14, 20, 35 |
Max Allowable Differential Pressure (MPa) | 1.6, 1.5, 0.5 |
Temperature Adjustment Range (°C) | 0~70℃, 50~120℃, 100~170℃, 150~220℃, 200~270℃ |
Adjustment Accuracy | ±5% |
Allowable Over-temperature Value | Upper limit of each temperature range +50℃ |
Ambient Temperature (°C) | -40℃ ~ +80℃ |
Mounting Thread | G1” |
Capillary Length (m) | 3m, 5m |
3.1 Rated Flow Coefficient (Kv)
DN | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 |
Single-seat | 5 | 7 | 11 | 20 | 30 | 48 | 75 | 120 | 190 | 300 | 480 | 760 | 1100 |
Double-seat | — | — | 12 | 22 | 33 | 53 | 53 | 132 | 209 | 330 | 528 | 836 | 1210 |
Cage Type | — | — | 11 | 20 | 30 | 48 | 75 | 120 | 190 | 300 | 480 | 760 | 1100 |
3.2 Leakage Standard
Hard Seal:
Double-seat & Cage type: 5×10 of rated valve capacity (Level II)
Single-seat type: 1×10 of rated valve capacity (Level IV)
Soft Seal (ml/min): DN15~50: 0.15; DN65: 0.30; DN80: 0.45; DN100: 0.60; DN125: 0.90; DN150: 1.70; DN200: 4.0; DN250: 11.10
4. Overall Dimension
DN(mm) | D(mm) | D1(mm) | Bolt Hole (n-Φ) | L(mm) | d(mm) | L1(mm) | H(mm) | G(in) | Tube Length(m) |
32 | 135 | 100 | 4-Φ18 | 180 | 25 | 430 | 380 | 11/4″ | 3 |
40 | 145 | 110 | 4-Φ18 | 200 | 25 | 430 | 410 | 11/4″ | 3 |
50 | 160 | 125 | 4-Φ18 | 230 | 25 | 430 | 450 | 11/4″ | 3 |
65 | 180 | 145 | 4-Φ18 | 290 | 25 | 430 | 490 | 11/4″ | 3 |
80 | 195 | 160 | 8-Φ18 | 310 | 25 | 430 | 530 | 11/4″ | 3 |
100 | 215 | 180 | 8-Φ18 | 350 | 25 | 430 | 560 | 11/4″ | 3 |
125 | 245 | 210 | 8-Φ18 | 395 | 25 | 550 | 600 | 11/4″ | 4 |
150 | 280 | 240 | 8-Φ23 | 470 | 25 | 550 | 640 | 11/4″ | 4 |
200 | 335 | 295 | 12-Φ23 | 600 | 25 | 550 | 690 | 11/4″ | 4 |
250 | 400 | 355 | 12-Φ23 | 630 | 25 | 550 | 720 | 11/4″ | 4 |
5. Notes
1. D, D1 and bolt hole dimensions above apply to PN1.6MPa flange standard.
2. For PN2.5MPa products or special sizes of DN15, DN20, DN25 and DN300, please consult our company for detailed dimensions.
3. Optional valve body materials: Ordinary cast iron, ductile iron, cast steel.
