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View Flow Restrictors for
Flow Restrictors

43 Series Visco Jet® Multi-Orifice Restrictor

This multi-orifice flow restrictor incorporates slots and spin chambers to form a complex fluid passage. This provides a greater minimum passage for a given restriction and is better suited to handle much higher levels of contamination. Additionally, the fluid velocity is reduced by the series of restrictions, thus reducing the chances of cavitation. With robust screens protecting for bidirectional flow, the 43 Series Visco Jet® Multi-Orifice Restrictor is available calibrated to ± 5% or ± 10% tolerance.

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Key Product Facts
  • Type:Multi-Orifice
  • Diameter:0.43 inches
  • Metered Flow Range:5000 to 2,200,000 Lohms
  • Test Fluid:Water
  • Operating Pressures:Up to 3000 psi
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Product Information

General Performance
Characteristic Specification
Lohm Rate Tolerance ± 5% or ± 10%
Maximum Working Pressure 3000 psid
Nominal Weight 5.8 - 7.7 grams
Materials
PART MATERIAL SPECIFICATION
Body 303 CRES QQ-S-763C
Visco Stack 304L CRES ASTM A 666
Screen 1 304L CRES ASTM A 666
Screen 2 304L CRES ASTM A580 / 580M
Braze - AWS A5.8BNi-6
Screen Spacer 1 303 CRES QQ-S-763C
Screen Spacer 2 410 CRES AMS QQ-S-763
End Washer 303 CRES QQ-S-763C
Shims 304L CRES ASTM A 666 & AMS 5647
“A” Washer 303 CRES QQ-S-763C
Back Up Rings Customer Supplied (MS28774-011)
“O” Ring Customer Supplied (M83248/2-011)
Finish: All CRES Parts Passivated
Dimensional Views & Installation Hole Details

For dimensions, please refer to the Part Numbers & Specifications tab.

Part Numbers & Specifications

This table below contains the part numbers and technical specifications for this product. If you have specific questions, need a quote, or would like to request a handbook or drawing, click the red request button in the column on the far right.

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Dimensional View
Installation Hole Details
Part Numbers & Specifications
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Tolerance
PART NUMBER
Tolerance
LOHM RATE "L" Dimension (in) "A" Depth Ream ± 0.002 (in) Minimum Passage Size (in) Total Screen Area (in2) Screen Open Area (in2) Screen Hole Size (in) Request Information
VDCA4335500D ± 5% 5000 Lohms 0.569 0.654 0.031 0.07 0.025 0.02 Request
VDCA4335700D ± 5% 7000 Lohms 0.63 0.715 0.031 0.07 0.025 0.02 Request
VDCA4325250H ± 5% 25,000 Lohms 0.434 0.519 0.015 0.07 0.014 0.01 Request
VDCA4325326H ± 5% 32,600 Lohms 0.434 0.519 0.015 0.07 0.014 0.01 Request
VDCA4325460H ± 5% 46,000 Lohms 0.434 0.519 0.015 0.07 0.014 0.01 Request
VDCA4325565H ± 5% 56,500 Lohms 0.569 0.654 0.015 0.07 0.014 0.01 Request
VDCA4325650H ± 5% 65,000 Lohms 0.569 0.654 0.015 0.07 0.014 0.01 Request
VDCA4325730H ± 5% 73,000 Lohms 0.569 0.654 0.015 0.07 0.014 0.01 Request
VDCA4315950K ± 5% 950,000 Lohms 0.434 0.519 0.005 0.043 0.01 0.001 Request
VDCA4315135T ± 5% 1,350,000 Lohms 0.569 0.654 0.005 0.043 0.01 0.001 Request
VDCA4315220T ± 5% 2,200,000 Lohms 0.569 0.654 0.005 0.043 0.01 0.001 Request
VDCA4330500D ± 10% 5000 Lohms 0.569 0.654 0.031 0.07 0.025 0.02 Request
VDCA4330700D ± 10% 7000 Lohms 0.63 0.715 0.031 0.07 0.025 0.02 Request
VDCA4320250H ± 10% 25,000 Lohms 0.434 0.519 0.015 0.07 0.014 0.01 Request
VDCA4320326H ± 10% 32,600 Lohms 0.434 0.519 0.015 0.07 0.014 0.01 Request
VDCA4320460H ± 10% 46,000 Lohms 0.434 0.519 0.015 0.07 0.014 0.01 Request
VDCA4320565H ± 10% 56,500 Lohms 0.569 0.654 0.015 0.07 0.014 0.01 Request
VDCA4320650H ± 10% 65,000 Lohms 0.569 0.654 0.015 0.07 0.014 0.01 Request
VDCA4320730H ± 10% 73,000 Lohms 0.569 0.654 0.015 0.07 0.014 0.01 Request
VDCA4310950K ± 10% 950,000 Lohms 0.434 0.519 0.005 0.043 0.01 0.001 Request
VDCA4310135T ± 10% 1,350,000 Lohms 0.569 0.654 0.005 0.043 0.01 0.001 Request
VDCA4310220T ± 10% 2,200,000 Lohms 0.569 0.654 0.005 0.043 0.01 0.001 Request
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All dimensions are in inches. This information is for reference only.

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The Lee Company has developed the Lohm Laws for defining and measuring resistance to fluid flow. The Lohm is defined such that 1 Lohm will flow 100 GPM of water with a pressure drop of 25 psi at a temperature of 80°F.

Lohms for Liquids Lohms for Gases