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202608251534
202608251534

Pneumatic thin film double seat regulating valve LDZJH (N)

LDZJHN series pneumatic thin film double seat regulating valve

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Structural optimality: equal cross-section low flow resistance channel, large rated flow coefficient Valve body parameters
Good adjustable type: large adjustable range, flow characteristics can be selected as equal percentage or linear Nominal pressure PN16, PN25, PN40, PN64
Good sealing performance: can choose soft seal or corrugated pipe seal to improve sealing performance Connection method: flange type, (special: welding type)
Widely used: various valve seat structures, heat sinks, suitable for different pressure differentials and temperatures Valve body materials WCB, SS304, SS316, SS316L
Valve core materials: SS, SS304, SS316, SS316L, and Steyr welding
Technical Parameters Sealing material PTFE, hard seal, special high-temperature material
Action mode: air open, air closed Bellows SS, SS304, SS316
Valve seat structure N double seat Packing PTFE, flexible graphite
Percentage and linearity of traffic characteristics Push rod liner 2Cr13
Adjustable range 50:1 Gasket rubber asbestos board, 1Cr18Ni9Ti asbestos wrapped gasket
Signal range Pr: 0.2~1bar, 0.4~2bar Flange standards GB9113-88, JB/T79-94, GB2555-81
Gas source pressure Ps: 1.4 bar~4 bar
Sealing grade III, IV, V, VI Function attachment options
Environmental temperature -30 ℃~+70 ℃ (see locator parameters for explosion-proof type) E – Explosion proof type (electrical locator explosion-proof level optional: explosion-proof type, intrinsic safety type)
Basic error ± 2.5% X – with signal feedback (electrical locator with feedback or equipped with valve position transmitter)
Input signal 4~20mA DC, 0~10V DC S – with handwheel mechanism
Output signal 4~20mA DC, 0~10V DC Q – Fully Cut off Type
Explosion proof grade dIIBT4/T5/T6, dIICT4/T5/T6, intrinsic safety type Attachment: Electrical locator, air filter pressure reducer, air lock valve, solenoid valve

 

Specifications and Technical Parameters
Nominal diameter DN (mm) 25 32 40 50 65 80 100 125 150 200
Rated flow coefficient Kv Straight line 12.1 19.4 30.3 48.3 75.9 121 193.6 302.5 484 759
Equal Percentage 11 17.6 27.5 44 69.3 110 176 275 440 693
Rated process L (mm) 16 25 40 60
Membrane limited area Ae (cm2) 280 400 600 1000
Allowable leakage Level II (5 × 10-3 × valve rated capacity) Level IV (10-3 × valve rated capacity)
Working temperature Room temperature type -20℃～200℃、-40℃～250℃、-60℃～250℃
Heat dissipation -40℃～450℃、-60℃～450℃
high-temperature type 450℃～560℃
Low-temperature type -60℃～-100℃、-100℃～-200℃、-200℃～-250℃

 

Allowable differential pressure pneumatic open control valve, allowable differential pressure gauge unit: MPa
Effective area of membrane Ae (cm2) 280 400 600 1000
Signal range Pr (kPa) 20-100 40-200 20-100 40-200 20-100 4-200 20-100 40-200
Gas source pressure Ps (MPa) 0.14 0.25 0.14 0.25 0.14 0.25 0.14 0.25
Accessories required – P – P – P – P
public 25 25 5.57 6.4
call, name, say, weigh 32 32 6.16 6.4
through 40 25 5.57 6.4
path 32 6.16 6.4
DN(mm) 40 4.9 6.4
and 50 32 6.16 6.4
valve 40 4.9 6.4
seat 50 3.9 6.4
straight 65 65 4.48 6.4
path 80 50 3.9 6.4
d(mm) 65 4.48 6.4
80 3.62 6.4
100 65 4.48 6.4
80 3.62 6.4
100 2.89 6.4
125 125 3.85 6.4
150 100 2.89 6.4
125 3.85 6.4
150 3.2 6.4
200 125 3.85 6.4
125 3.2 6.4
200 1.6 4.81

 

Allowable differential pressure pneumatic open control valve, allowable differential pressure gauge unit: MPa
Effective area of membrane Ae (cm2) 280 400 600 1000
Signal range Pr (kPa) 20-100 40-200 20-100 40-200 20-100 4-200 20-100 40-200
Gas source pressure Ps (MPa) 0.14 0.25 0.14 0.25 0.14 0.25 0.14 0.25
Accessories required – P – P – P – P
公 25 25 5.57 6.4
称 32 32 6.16 6.4
通 40 25 5.57 6.4
径 32 6.16 6.4
DN(mm) 40 4.9 6.4
及 50 32 6.16 6.4
阀 40 4.9 6.4
座 50 3.9 6.4
直 65 65 4.48 6.4
径 80 50 3.9 6.4
d(mm) 65 4.48 6.4
80 3.62 6.4
100 65 4.48 6.4
80 3.62 6.4
100 2.89 6.4
125 125 3.85 6.4
150 100 2.89 6.4
125 3.85 6.4
150 3.2 6.4
200 125 3.85 6.4
125 3.2 6.4
200 1.6 6.4

*P: Valve positioner
*For the allowable pressure difference of the reduced volume valve body, the allowable pressure difference of the full volume valve body with the same diameter shall be measured.

Dimensions Unit: mm
Nominal diameter (DN) 25 32 40 50 65 80 100 125 150 200
ΦA 282 308 394 498
L PN16 160 180 200 230 290 310 350 400 480 600
PN64 230 260 260 300 340 380 430 500 550 650
H1 PN16 91 108 128 135 150 185 202 225 303 340
PN40 91 108 118 135 150 185 202 225 303 340
PN64 120 132 137 159 179 205 253 266 288 376
H mark PN16 376 414 424 440 548 583 583 743 853 857
accurate PN40 376 414 424 440 548 583 583 743 853 857
mold PN64 397 453 440 474 567 602 663 752 809 897
High-temperature type 506 544 554 570 697 708 713 868 1003 1061
Bellows type 446 487 499 558 690 704 711 854 998 1042
Low-temperature type Normal height+(700-1000)

 

Dimensions Unit: mm
Nominal diameter (DN) 25 32 40 50 65 80 100 125 150 200
ΦA 282 308 394 498
L PN16 160 180 200 230 290 310 350 400 480 600
PN64 230 260 260 300 340 380 430 500 550 650
H1 PN16 91 108 128 135 150 185 202 225 303 340
PN40 91 108 118 135 150 185 202 225 303 340
PN64 120 132 137 159 179 205 253 266 288 376
H mark PN16 376 414 424 440 548 583 583 743 853 857
accurate PN40 376 414 424 440 548 583 583 743 853 857
mold PN64 397 453 440 474 567 602 663 752 809 897
High-temperature type 506 544 554 570 697 708 713 868 1003 1061
Bellows type 446 487 499 558 690 704 711 854 998 1042
Low-temperature type Normal height+(700-1000)

 

Weight Table of Regulating Valve Unit: kg
Nominal diameter 20 25 32 40 50 65 80 100 125 150 200
weight standard form PN16 24 25 30 33 60 73 88 140 168 224
（kg） PN40 24 25 30 33 50 73 88 140 176 235
PN64 27 28 38 42 76 92 108 160 203 325
high-temperature type 25 26 31 35 63 77 92 147 176 235
Bellows type 28 31 39 43 73 96 122 178 213 279
Low-temperature type Weight increase of ordinary type (10-20)%
low ΦD3 260 285 305 340 370 405 460 525 590 700
warm ΦD4 290 315 335 370 400 435 490 555 630 740
mold Bolt holes n-d 8-14 8-14 8-16 10-16 10-16 10-16 12-18 14-18 16-18 18-18

Note:
*Flange sealing surface form: PN10 and PN16 are convex surfaces, PN40 and PN64 are concave and convex surfaces, and the valve body is concave
*Structural length: According to GB12221-89 standard
*Thin film actuator gas signal interface: internal thread M16 * 1.5
*Jacket insulation type jacket heat carrier interface: butt welding with a diameter of Φ 18 * 4
*The distance between the valve body flange and the flange end face can be manufactured according to the standard specified by the user.

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Get More Benefits Since Submit The Info Form

*We respect your confidentiality and all information are protected.

Contact Us Right Now, Get Reply Today.

I’m Leo, the head of sales team at Huaxiang. Me and my team would be happy to meet you and learn all about your business, requirements and expectations.

Carson
Paul
Linsey