Domed Vent Cap – Cangzhou Huairong Pipeline Equipment Co., Ltd.

PRODUCT PARAMETERS

The Dome-Type Vent Cap (also known as Vent Pipe, Breather Cap, or Z-Type Vent Cap) is a core venting and protective component in water supply & drainage systems and storage tank setups. It is composed of a cylinder body, top cover, lifting ring, and support rods.

Its primary functions are to balance the internal and external air pressure of pipelines or water tanks, discharge harmful gases, prevent negative pressure from collapsing structures, and block rainwater and debris from entering pipelines and causing blockages. It is a critical accessory for water tanks, storage tanks, and water supply & drainage pipelines.

Application Fields: Widely used in municipal water supply and drainage, fire-fighting water tanks, wastewater treatment plants, waterworks, petrochemical industry, electric power, and metallurgy sectors. Suitable for venting systems of tanks/pools containing various media such as clean water, wastewater, petroleum products, and gases—especially for outdoor applications requiring long-term use, debris prevention, and pressure balance.

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Description

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Description

Item	Specification
Product Size	DN100–DN600 (4″–24″) and other common specifications; customization available
Pressure Rating	Atmospheric pressure design; pressure-bearing models can be customized according to working conditions
Manufacturing Standards	Complies with GB 02S403, ANSI, DIN, JIS and other international standards
Material	Body / Cylinder / Flange: Carbon steel, stainless steel, alloy steel; Seals: Rubber gaskets (configured as required)
Surface Treatment:	Pickling and passivation, anti-rust oil coating, anti-corrosion painting, hot-dip galvanizing, sandblasting, etc., as per customer requirements
Origin	China
Connection Type	Welded connection; flanged connection customizable
Temperature Range	-40°C ~ +420°C (specific temperature resistance depends on material and application conditions)

FAQs

Are you a manufacturer or a trading company?

Can you manufacture customized flanges and pipe fittings?

Yes. In addition to standard products, we provide customized flanges and pipe fittings according to customers’ drawings, technical specifications, material requirements, dimensions, pressure ratings, surface treatments, and application conditions. Our production facilities support forging, pressing, machining, cold forming, hot extrusion, heat treatment, and other manufacturing processes.