610-497-2600

MODEL 338 BLOWER RELIEF VALVE

Features

• Large nozzle design provides high capacity.
• Soft seat design for optimum shutoff.
• Lightweight construction.
• Valve modulates specifically for bulk transportation blower applications.
• Hard coat anodized aluminum bonnet for corrosion protection.
• Tamper-resistant cap protects factory setting.
• Tested and inspected for pressure setting and leakage.

GENERAL APPLICATION

Model 338 is suitable for the protection of low to medium pressure, high volume blowers and for use on bulk hauling trailers and equipment.

TECHNICAL DATA

Connections:Threaded NPT
Temperature range:-30° to 400°F (-34° to 204°C)
Pressure range:5 to 30 psig (0.34 to 2.07 barg)

PARTS AND MATERIALS

No.Part NameMaterialMaterial specification
1Adjustment screwSSSS 18-8
2Anti-tamper seaNylonCommercial
3VentCSAISI 12L14
4BonnetAluminum356-T6 w/anodize
5Spring stepAluminumASTM B209-5052-H32
6SpringSS17-7 or 302
7GuideAluminum356-T6 w/anodize
8ScrewSSSS 18-8
9DiaphragmSiliconeAMS-3320
10Disc holderBrassASTM B36 Alloy 260
11Seat discSiliconeAMS-3320
12WasherAluminum6061-T6
13Rivet, bulb-titeAluminumCommercial
14NozzleAluminumASTM B26-356-T6
15Lock nutSSSS 18-8
16Anti-tamper sleevePolyolefinVersaFit 3/4-0-FSP
Optional – set screw with tamper-evident heat shrink sleeve that provides protection of factory setting

SPECIFICATIONS

End connectionModelWeight
NPTlbs. (kgs)
2" (50.8 mm)3382.7 (1.23)

FLOW CAPACITY (MALE THREADED)

Set (psig)Flow at full lift (SCFM)
5271
7366
9461
12603
15746
18888
20983
231125
251220
271315
301458

SELECTION GUIDE

Example:0338-H01-NM0015
Model

0338
Variation

01       Male Inlet, with cut-off screw

02       Male Inlet, with tamper-evident sleeve
Set pressure

5 psig (0005) to 30 psig (0030)
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