303-699-1135
Series 3 Air-Pilot Operated Valve Cv= .73 - 1.37
Part Number Mounting Function Flow Rate Cv Min. pil P
338-033 without base
3-way/2-position NC
700
.73
2.5 bar
338L-033 on manifold
3-way/2-position NC
700
.73
2.5 bar
334-033 without base
3-way/2-position NC
1300
1.37
2.5 bar
Dimensions (in Inches)
Part Number A A1 B C D E F G H I L M N O P S T U Z
338-033 1/8
1/8
5
-
-
-
18
30.4
18
30.4
78.8
22
-
11.5
32
41.7
-
-
-
338L-033 1/8
1/8
5
3.2
13.4
32.7
18
30.4
-
30.4
78.8
22
17.4
-
32
41.7
-
-
-
334-033 1/4
-
4.1
-
-
-
22
29.7
22
29.7
81.3
25
-
16
40
40.7
M5
-
-
(Part Listed Is BSP - For NPT Sizes Add TF to Order Code)
Coding Example
Coding Example
3 Series 3
5 Function (Way/Position) = 3/2 Normally Closed4 = 3/2 Normally Open5 = 5/26 = 5/3 Centers Closed7 = 5/3 Centers Open (exhausting)8 = 5/3 Pressure Center9 = Dual 3/2 (1 x normally closed and
1 x Normally Open)
8 Ports 8 = 1/84 = 1/42C = 1/2
D __ = Blank (standard)D = double valve 2 x 3/2 way
(only Series 3)L = Manifold assembly required
(only for 3/2 way 1/8 Series 3)
035 Actuation / Return033 = pneum. / pneum. (series 3 Double Air-Pilot035 = pneumatic / spring (series 3) Single Air-Pilot
TF Ports TF = NPTF
Technical Specifications
Valve group 3-way/2-position, 5-way/2-position, 5-way/3-position and dual 3-way/2-position
Construction Air-Pilot, in-line ported
Mounting through holes in valve body
Materials Anodized body, stainless steel spool, Buna-N seals
Threaded port sizes 1/4", 1/8" NPTF
Installation in any position
Operating temperature 0 - 80°C (with dry air at -20°C), 32°F - 176°F (with dry air at -4°F)
Fluid Filtered air (25 micron or less recommended)
Lubricant Not required; otherwise, oil compatible with Buna-N, (3° - 10°E); ISOVG32 grade, 32 centistrokes
Pneumatic Data
Operating pressure P = -.9 -10 bar (0-145 psi): (Down to 28" Hg possible)
Control pressure min. press. (see valve description)
Nominal pressure 6 bar (87 psi)
Nominal flow *Qn Series 3: 1/8" = 700 NL/min (24.7 SCFM), Cv= .73
Nominal diameter Ø1/8 = 5 mm, 1/4" = 7.5 mm
Fluid filtered air, without lubrication** (25 micron or less recommended)
*Qn = determined with supply pressure of 6 bar and with Dp = 1 bar.
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