，确保在常压和高压环境下稳定运行。以下是针对不同规格的阀门人孔详细说明：

规格型号

DN150: 人孔盖/人孔颈圈厚度为2-3MM，下颈高度为90MM。

DN250: 人孔盖/人孔颈圈厚度为2-3MM，下颈高度为90MM。

DN300: 人孔盖/人孔颈圈厚度为2.5-3MM，下颈高度可选95或120MM。

...（省略其他规格描述）

型式与材质

本公司提供方形、圆形、椭圆形及手孔盖等多种型式的阀门人孔。主要材料包括304、316L、321、304L以及904L和2205等不锈钢材质。

标准与尺寸

所有产品均符合国家相关标准，并可以根据客户要求定制非标尺寸。

光洁度与包装

内部外部光洁度达到Ra≤0.8μm，可以选择机械抛光或电抛光提高到Ra≤0.4μm。产品采用纸箱包装，并配备防震膜以保证安全运输。

应用领域

这些阀门适用于食品、饮料、大量乳制品生产以及精细化工行业中的罐头容器转运过程中的人口连接需求。

外形尺寸 & 供应范围

外形直径从∮200至∮500mm，不锾钢人坑广泛应用于食品乳品化工等罐头容器工业，可供货DN200至DN600的各类非标产品。

特殊说明（QR型）

开口向外QRJ类型适用于顶部有通往容器内部途径右关闭的压力罐及容器。在承受1000Kp（10bar）高压后依然保持良好性能。

8.GMP要求制造

为了满足GMP质量控制要求，本公司采用电脑三维设计技术生产该系列产品，以确保其在制造加工过程中严格遵循FDA规定，从而适合食品生物制药领域使用。此外，该系列不错钢物件可承受蒸汽清洗并自动排空流体通道，使其尤其适合需要清洗操作的地方使用，如蒸汽干燥室或者化学处理设备附近位置安装时能有效减少残留物积累风险.

9.Circular Type Pressure Relief Valve

Circular type pressure relief valve is designed for high-pressure applications, with a maximum working pressure of 5 bar.

10.Elliptical Type (Pressure)

Elliptical type valves are available in various sizes and can withstand pressures up to 5 bar.

11.Square Type (Non-pressure)

Square type non-pressure relief valves are used for liquid transfer applications where dust protection is required.

12.Longitudinal Sectional View of Elliptical Valve

The longitudinal sectional view of an elliptical valve shows the internal structure and flow path through the valve body.

The figure below illustrates the internal components of an elliptical valve:

Figure [insert image description here]

13.Product Dimensions & Specifications

Product dimensions vary depending on the size and application requirements, but standard sizes include:

Circular type: 400×100, 430×100, 450×100, 500×100, or 600×100 mm.

Square type: custom-made to fit specific container shapes and sizes.

Elliptical type (pressure): available in various dimensions such as [insert dimension specifications here].

14.Application Areas & Industries

These valves find widespread use in food processing plants that produce dairy products, beverages like beer or soft drinks; pharmaceuticals; chemical manufacturing; biotechnology industries involving fermentation processes; petrochemical facilities handling corrosive materials; oil refineries processing crude oil into petroleum products like gasoline or diesel fuel etc., among others.

15.Product Price Information

For further information about pricing please contact our sales team at [sales email address] or call us directly at [phone number]. We will be happy to provide you with a quote based on your specific requirements.

We offer competitive pricing for bulk orders while maintaining strict quality control measures throughout every step from raw material sourcing to finished product delivery so that you get nothing less than exceptional value for money when purchasing from us!