Fluid Cap/Body for Spray Nozzles | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Fluid Cap / Body

Definition

The Fluid Cap/Body is the primary structural component of a spray nozzle assembly, serving as the housing that encloses internal parts, maintains pressure integrity, and provides the fluid passageway from the inlet to the orifice. It determines the nozzle's connection type, mounting configuration, and overall durability. This component is typically manufactured from materials such as Stainless Steel 316, Brass, or PVC, selected based on the application's chemical compatibility, pressure, and temperature requirements. The body's design includes an inlet connection, typically threaded per ISO 7-1 with sizes ranging from 1/4 to 1 inch, and an internal chamber that directs fluid toward the orifice plate or spray tip. The operating pressure range is 1.0–1.6 MPa, with a pressure rating of PN16–PN40 per ISO 7268, and the flow rate varies from 5 to 50 L/min depending on nozzle size and pressure. The temperature range is -40 to 85°C, limited by seal material, which can be NBR or FKM per ASTM D2000. Critical dimensions are held to a tolerance of ±0.05 mm per ISO 2768-m, and surface finish on sealing surfaces is Ra 0.8–1.6 µm per ISO 1302. Thread tolerances are 6g–6H per ISO 965-1. The overall length ranges from 50 to 150 mm, and weight from 0.5 to 2.5 kg. Material grades for stainless steel are typically SS304–SS316 per ASTM A276, with 316 recommended for corrosive media. These values are reference ranges; actual specifications must be confirmed with the manufacturer for the specific model and application. The Fluid Cap/Body is essential for ensuring proper spray performance, pressure containment, and system reliability.

Working Principle

Fluid enters the body through an inlet connection, flows through an internal chamber where pressure is maintained, and is directed toward the orifice plate or spray tip. The body's geometry controls flow characteristics and provides structural support for all internal components. The internal chamber is designed to minimize pressure drop and ensure uniform flow distribution. The body's material and wall thickness must withstand the operating pressure and temperature. The inlet connection size and thread type determine compatibility with the piping system. The body also provides mounting points for the nozzle assembly, ensuring proper alignment and sealing. The surface finish of internal passages affects flow resistance and wear resistance. The body's design must accommodate the seal material and maintain a leak-tight joint under varying thermal and pressure conditions. Proper installation and torque are critical to avoid over-stressing the body or damaging threads. Regular inspection for corrosion, erosion, or cracking is necessary to maintain performance and safety.

Common Materials

Stainless Steel 316, Brass, PVC

Technical Parameters

Parameter	Typical range	Notes & selection driver
Flow Rate	5–50 L/min	Depends on nozzle size and pressure
Inlet Connection Size	1/4–1 inch	Thread type per ISO 7-1ISO 7-1
Material Grade	SS304–SS316	316 for corrosive mediaASTM A276
Temperature Range	-40–85 °C	Seal material limits
Weight	0.5–2.5 kg	Depends on size and material
Surface Finish	Ra 0.8–1.6 µm	Critical for sealing surfacesISO 1302
Tolerance on Critical Dimensions	±0.05 mm	Ensures proper fit and sealingISO 2768-m
Thread Tolerance	6g–6H	For external and internal threadsISO 965-1
Pressure Rating	PN16–PN40	Max allowable working pressureISO 7268
Seal Material	NBR–FKM	FKM for high temp and chemical resistanceASTM D2000
Overall Length	50–150 mm	Varies with connection size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Inlet Thread Part
Provides connection to fluid supply line

Material: Same as body material
Internal Chamber Part
Holds fluid under pressure before discharge

Material: Same as body material
Mounting Flange Part
Secures nozzle to equipment or piping

Material: Same as body material
Orifice Seat Part
Precise surface where orifice plate or tip seals

Material: Same as body material

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Spray Nozzle Assembly

View system integration details

Manufacturers of Fluid Cap / Body

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Frequently Asked Questions

What materials are available for the Fluid Cap/Body?

The Fluid Cap/Body is available in Stainless Steel 316, Brass, and PVC. The choice depends on the application's chemical compatibility, pressure, and temperature requirements. For corrosive media, Stainless Steel 316 is recommended. Always confirm the material grade with the manufacturer for your specific application.

What is the operating pressure range for this component?

The reference operating pressure range is 1.0–1.6 MPa, with a pressure rating of PN16–PN40 per ISO 7268. However, the actual allowable pressure depends on the specific model, material, and temperature. Verify the maximum allowable working pressure with the manufacturer.

What standards apply to the Fluid Cap/Body?

Relevant standards include ISO 7-1 for thread types, ISO 1302 for surface finish, ISO 2768-m for tolerances, ISO 965-1 for thread tolerances, ISO 7268 for pressure ratings, ASTM A276 for material grades, and ASTM D2000 for seal materials. These standards serve as verification references; compliance must be confirmed with the supplier.

How do I select the correct Fluid Cap/Body for my nozzle?

Selection requires considering the fluid type, operating pressure and temperature, flow rate, inlet connection size, and material compatibility. The reference parameters provide a starting point, but you must consult the manufacturer's datasheet or engineering support to ensure the component meets your system's requirements.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 100 bar (1450 psi)
flow rate:	0.5 to 500 L/min
temperature:	-40°C to 150°C
slurry concentration:	Up to 30% solids by weight

Fluid Cap / Body

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards