Parameter

Value

Nominal diameter DN, mm

250–300

Operating pressure PN, bar

16

Working medium temperature t, °C

From -20 to +110

Working medium

Water, steam, aggressive media, and abrasive liquids (e.g., cement, sand, bauxite, etc.)

Flow direction

Two-way

Tightness class

Class A

Connection to pipeline

Interflanged

Body material

Cast iron QT450

Seal material

EPDM with wear-resistant coating

Service life, years

10

DN

Model
electric actuator

Size, mm

H

H1

D1

D2

n-d

L

100

QT-N-020EMT

175

106

180

153

4 - Ø23

241.8

125

194

119

210

176

4 - Ø23

241.8

150

206

132

240

207

4 - Ø25

241.8

№

Part name

Material

1

Body

Cast iron QT450

2

Disc

Stainless steel 316L

3

Seat seal

EPDM + wear-resistant material (siliclone + graphite)

4

Stem

Steel 2Cr13

Parameter

Value

Type of electric actuator

Quarter-turn

Type of motor

Asynchronous

Angle of rotation, °

90±5

Body material

Aluminum alloy with epoxy powder coating

Shaft material

Alloy steel

Supply voltage

24V/DC

Cable entry

Sealed gland 2xM18

Type of connection

ISO 5211

Self-locking mechanism

Worm and worm gear self-locking

Automatic shut-off

2 limit switches (open/closed positions and in case of jamming)
+ 2 additional switches (dry contact)

Thermal protection

Activation at 120°C ±5°C
Deactivation at 97°C ±5°C

Insulation class

F

Mechanical output shaft rotation limit

2 external adjustable stops

Protection rating

IP67

Noise level, dB

≤ 50

Heater power, W

5

Ambient temperature, °C

From -20 to +70

Ambient humidity

≤ 95% (at 25°C)

Explosion-proof protection

No

№

Name

1

Position indicator

2

Upper cover

3

Control board

4

Capacitor

5

Actuating cam followers

6

Output shaft with worm gear

7

Body

8

Output shaft travel limiters

9

Worm shaft

10

Electric motor

11

Gearbox

12

Gearbox cover