Marwin Valve UT Series Pneumatic Actuators User Manual
Page 4
-4-
SPRING SETTING for UT-0 to UT-4
Set
External
Spring
Central
Spring
Internal
Spring
Air Supply,
psi/(bar)
01
1
−
1
36-44 / 2.5-3
02
2
−
0
44-58 / 3-4
03
1
−
2
44-73 / 3-5
04
2
−
1
58-80 / 4-5.5
05
2
−
2
73-87 / 5-6
SPRING SETTING for UT-5 and UT-6
Set
External
Spring
Central
Spring
Internal
Spring
Air Supply,
psi/(bar)
01
0
2
0
36-44 / 2.5-3
02
2
0
0
44-58 / 3-4
03
1
2
0
44-73 / 3-5
04
2
0
2
58-80 / 4-5.5
05
2
2
0
73-87 / 5-6
06
2
2
2
87-102 / 6-7
PRETENSIONED SPRINGS For UT-7
Set
Side 1
Side 2
01
2
3
02
3
3
03
3
4
04
4
4
05
4
5
06
5
5
07
5
6
08
6
6
MATERIAL SPECIFICATIONS
Item
Description
Material
Treatment
Qty. DA
Qty. SR
1
Body
Extruded Aluminum
Hard Anodized
1
1
2
Anti-Blowout Pinion
Steel
Nickel Plated
1
1
3* (R)
Lower Pinion O-Ring
NBR 70 Shore
1
1
4* (R)
Top Pinion O-Ring
NBR 70 Shore
1
1
5* (R)
Pinion Spacer Ring
PTFE 15% Graphite
1
1
6 (R)
Piston Snap Ring
Steel
Nickel Plated
1
1
7
Piston
Die Cast Aluminum
2
2
8* (R)
Piston O-Ring
NBR 70 Shore
2
2
9* (R)
Anti-Friction Ring
PTFE 15% Graphite
2
2
10* (R)
Piston Thrust Block
PTFE 15% Graphite
4 6 ***
4 6 ***
11* (R)
Stop Bolt O-Ring
NBR 70 Shore
2
2
12
Stop Bolt Washer
Stainless Steel A2
2
2
13
Stop Bolt Retaining Nut
Stainless Steel A2
2
2
14
Stop Bolt
Stainless Steel A2
2
2
15
External Spring
Steel
Zinc Phosphate
0
See Table
16
Central Spring
Steel
Zinc Phosphate
17
Internal Spring
Steel
Zinc Phosphate
18
Left End Cap
Die Cast Aluminum
Painted
1
1
19
Right End Cap
Die Cast Aluminum
Painted
1
1
20
End Cap Fixing Screw
Stainless Steel A2
8 12 ***
8 12 ***
21 (R)
End Cap O-Ring
NBR 70 Shore
2
2
22 (R)
O-Ring for Air Supply Hole
NBR 70 Shore
2
2
23
Comp. Spring (UT-7 only)
Steel
Zinc Phosphate
0
12
24* (R)
Anti-Friction Ring (UT-7 only)
PTFE 15% Graphite
1
1
25 (R)
Washer (UT-7 only)
Stainless Steel A2
1
1
* Parts subject to wear. (R) Repair Kit Item. 6 &12 Valid for UT-7 only.