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Waveguide-Pressure-Inlets-Section(1)

Waveguide Pressure Inlets Section

Waveguide pressure inlet sections provide a gas connection to a pressurized waveguide line, with valve and gauge options. Match the WR size, flange arrangement, exact inlet thread and configuration-specific pressure requirement.

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PRESSURIZED WAVEGUIDE HARDWARE

Waveguide Pressure Inlet Sections

Dolph Microwave pressure inlet sections introduce air or other gases into a waveguide line while supporting controlled internal pressure. Configurations are available with or without a pressure gauge, with cover, grooved or choke flange options, and with standard or customized mechanical configurations for the selected waveguide system.

WR650–WR1022 WPI models in the product brochure
15–45 / 15–20 PSIGBrochure pressure ranges; select the model
Alloy by orderBase metal and finish specified separately
With / WithoutOptional pressure-gauge configuration

CONFIGURATION SUPPORT

Match the inlet section to your waveguide line

Send the operating band and waveguide size together with the required pressure, inlet connection, valve, length, flange style, material and gauge requirement. Dolph Microwave can then match a published configuration or discuss a customized mechanical configuration for the application.

Waveguide & band

Start with the WR size and operating frequency range so the mechanical section matches the line.

Pressure & monitoring

Select the required pressure range and whether an integrated pressure gauge is needed.

Inlet, valve & length

The WPI brochure lists a 1/8-27 NPT inlet and thicknesses of 50 or 19 mm by model. The separate WPISV valve configuration below lists NPTF and different lengths.

Flange & material

Choose the applicable cover, grooved or choke flange configuration and confirm the material/finish for the selected model.

Waveguide sizeWR650 to WR10 in the WPI model table
PressureModel-specific; see pressure tables
GaugeWith and without gauge
MaterialSpecify the base alloy; see PDF material note
FlangeCover, Grooved and Choke

OFFICIAL PRODUCT BROCHURE

WPI model specifications — from the product PDF

The WPI brochure lists separate models from WR650 through WR10. Its thickness field is 50 mm for WR650/WR510 and 19 mm for the remaining rows. Do not substitute these thicknesses for the 19/108/152 mm WPISV length options without a matching drawing. The WR90 upper band edge is 12.40 GHz in this table and 12.5 GHz in the WPISV table; confirm the required endpoint in the RF acceptance specification.

ModelWR TypeFrequency (GHz)VSWR Max.Thickness (mm)Pressure (PSIG)
DH-14WPI…WR6501.13-1.731.055015-45
DH-18WPI…WR5101.45-2.201.055015-45
DH-22WPI…WR4301.72-2.611.051915-45
DH-26WPI…WR3402.17-3.301.051915-45
DH-32WPI…WR2842.60-3.951.051915-45
DH-40WPI…WR2293.22-4.91.051915-45
DH-48WPI…WR1873.94-5.991.051915-45
DH-58WPI…WR1594.64-7.051.051915-45
DH-70WPI…WR1375.38-8.171.051915-45
DH-84WPI…WR1126.57-9.991.051915-45
DH-100WPI…WR908.20-12.401.051915-45
DH-120WPI…WR759.84-15.01.051915-45
DH-140WPI…WR6211.9-18.01.051915-45
DH-180WPI…WR5114.5-22.01.051915-45
DH-220WPI…WR4217.6-26.71.051915-45
DH-260WPI…WR3421.7-33.01.051915-45
DH-320WPI…WR2826.3-40.01.051915-45
DH-400WPI…WR2233.0-50.01.051915-20
DH-500WPI…WR1940.0-60.01.051915-20
DH-620WPI…WR1555.0-65.01.051915-20
DH-740WPI…WR1260.5-91.91.051915-20
DH-900WPI…WR1073.8-112.01.051915-20

Inlet thread, base metal and finish

Selection itemWhat to specify
Inlet threadThe WPI brochure lists 1/8-27 NPT. The additional WPISV valve table lists 1/8-27 NPTF. Keep the thread designation with its configuration and specify the mating thread and sealing procedure. Dryseal threads have different crest/root controls from standard pipe threads; matching nominal size and pitch alone does not define the same pressure-tight joint.[1]
Material and finishThe PDF features list aluminum and copper, its finish table lists brass, and its ordering example identifies A as aluminum. Specify the base alloy and treated surfaces on the order drawing. MIL-C-5541/MIL-DTL-5541 concerns conversion coatings on aluminum and aluminum alloys; the PDF’s brass/Iridite combination is not a consistent material-and-finish specification.[2]

SCHRADER-VALVE CONFIGURATIONS

WPISV Schrader-valve configuration — additional option

This separate WPISV table retains the website’s Schrader-valve configuration data. It is not the WPI table in the linked PDF. Its 45 PSIG, NPTF thread and length options apply only to the stated valve configuration; do not substitute them for the WPI brochure values above.

MODELFREQ. RANGE (GHz)WG SIZEVSWRPRESSURE (PSIG)INLET SIZE (CUSTOMIZABLE)GAS VALVESLENGTH (mm)COVERGROOVEDMATERIALDATASHEET
DH-14WPISV…1.13-1.73WR6501.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR14PDR14AlDWG / STEP on request
DH-18WPISV…1.45-2.2WR5101.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR18PDR18AlDWG / STEP on request
DH-22WPISV…1.72-2.61WR4301.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR22PDR22AlDWG / STEP on request
DH-26WPISV…2.17-3.3WR3401.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR26PDR26AlDWG / STEP on request
DH-32WPISV…2.6-3.95WR2841.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR32PDR32AlDWG / STEP on request
DH-40WPISV…3.22-4.9WR2291.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR40PDR40AlDWG / STEP on request
DH-48WPISV…3.94-5.99WR1871.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR48PDR48AlDWG / STEP on request
DH-58WPISV…4.64-7.05WR1591.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR58PDR58AlDWG / STEP on request
DH-70WPISV…5.38-8.17WR1371.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR70PDR70AlDWG / STEP on request
DH-84WPISV…6.57-9.99WR1121.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR84/UBR84PDR84/PBR84AlDWG / STEP on request
DH-100WPISV…8.2-12.5WR901.05:1451/8-27 NPTFSchrader Valves19, 108,152UDR100/UBR100PDR100/PBR100AlDWG / STEP on request
DH-120WPISV…9.84-15WR751.05:1451/8-27 NPTFSchrader Valves19, 108,152UBR120PBR120AlDWG / STEP on request
DH-140WPISV…11.9-18WR621.05:1451/8-27 NPTFSchrader Valves19, 108,152UBR140PBR140AlDWG / STEP on request
DH-180WPISV…14.5-22WR511.05:1451/8-27 NPTFSchrader Valves19, 108,152UBR180PBR180AlDWG / STEP on request
DH-220WPISV…17.6-26.7WR421.05:1451/8-27 NPTFSchrader Valves19, 108,152UBR220PBR220Al/CuDWG / STEP on request
DH-260WPISV…21.7-33WR341.05:1451/8-27 NPTFSchrader Valves19, 108,152UBR260PBR260Al/CuDWG / STEP on request
DH-320WPISV…26.3-40WR281.05:1451/8-27 NPTFSchrader Valves19, 108,152UBR320PBR320Al/CuDWG / STEP on request

Source: Dolph product brochure, printed pages 081–082. All 22 WPI rows specify maximum VSWR 1.05. WR650 and WR510 have a listed thickness of 50 mm; the remaining rows list 19 mm. Pressure is listed as 15–45 PSIG for WR650–WR28 and 15–20 PSIG for WR22–WR10. The PDF does not identify a separate proof-test pressure or leak-test procedure.

PART NUMBER GUIDE

WPISV valve option code

Product-page example: DH-100WPISV152PMA

100Waveguide Size — WR90
WPIWaveguide Type — Waveguide Pressure Inlets
SV152Schrader-valve section, length 152 mm. Specify the gauge option separately and request the complete order code.
108Length — 108 mm, Pressurizing Section with Schrader Valves
19Length — 19 mm, Flange Spacer Inlets
PFlange Type — Rectangular Flat
MFlange Type — Rectangular Grooved
A/CMaterial — Aluminium, Cu

BROCHURE ORDERING INFORMATION

WPI ordering example from the PDF

Brochure example: DH – 120 WPI 19 P M A

DHDolph Microwave
120WR75
WPIPressure Inlets
WPISGInlets Section with Pressure Gauge
19Thickness 19 mm
PFlange Cover
MFlange Grooved
AMaterial Al

FINISH & MECHANICAL OPTIONS

Surface treatment and configuration details

Body protectionCorrosion-protection treatment and flat-black body paint are catalog finish options. Match the treatment to the selected base metal.
Flange finishConfirm whether each flange is unplated, polished, conversion-coated or plated. Include any masked RF contact surfaces on the drawing.
Alternative finishesOther finishes and paint colors are available on request.
Mechanical configurationBoth standard and customized configurations are offered for application matching.

WHY IT MATTERS IN THE LINE

Define pressure access and RF acceptance together

The inlet provides a gas connection; it does not replace a regulator, relief device or leak test. Specify the gas, maximum differential pressure, permitted leak rate, gauge range and operating temperature. Check assembled VSWR across the required band, including the inlet and mating flanges.

Product Brochure PDF Flange Designations

APPLICATIONS

Installation checks by application

01

Radar systems

For radar feed lines, specify the pressure medium, RF power, flange arrangement and installation orientation.

02

Telecommunications

For long communication runs, identify the gas supply, regulator, low-pressure monitoring and accessible service position.

03

Satellite communications

For antenna feeds, check clearance around the feed support and access to the valve and gauge after installation.

04

Scientific research

For laboratory setups, define the pressure sequence, temperature, leak-rate limit and RF measurements in the test plan.

05

Aerospace

For aerospace assemblies, specify the applicable vibration, temperature, material and documentation requirements; qualification is configuration-specific.

DOCUMENTATION & SUPPORT

Order against the selected model and drawing

For quotation, include the required WR size, frequency range, operating pressure, inlet size, gauge requirement, flange type, length and material. Where published data differs by source or configuration, use the final selected drawing and confirmed order specification.

1-year product warrantyA one-year warranty from delivery covers defective material and workmanship, subject to the published warranty terms.
Quality and material documentationRequest the current quality-system certificate and scope for supplier review, plus any material declaration required for the selected part.
Configuration drawingRequest the selected model drawing to confirm flange details, thread designation, gauge orientation and installation dimensions.

REQUEST A CONFIGURATION

Send your waveguide and pressure requirements

Include the WR size, frequency, pressure, inlet connection, valve, length, flange, material and gauge requirement so the suitable pressure inlet section can be identified.

Contact Dolph Microwave sales@dolphmicrowave.com

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