SFRK-B500B双层保温直筒型人孔6点固定，8mm厚×110mm高的直筒型颈圈。双层盖面，内置保温层，可有效延缓罐内物品的散热，打开方式为上掀式。整套产品为全封闭结构，可直接焊接于罐体上。

SFRK-Z500A straight cylinder manhole,6 pegs,8mm (thickness) × 110 mm (height) straight cylinder Neckring.Double-layer cover, inner insulation which could effectively delay heat radiation of articles inside. Opening method chooses as flip-up, whole products apply full seal structure which could be directly welded on the tank directly.

技术资料Technical specifications：

重量weight：33kg

设计压力Design pressure：3Bar(43.5PSI)

试验压力Test pressure：4.5Bar(65.3PSI)

设计温度Design temperature：-20℃至200℃(-40℉至392℉）

材质有不锈钢304L、316L、Q345D等可选,根据客户的要求，我们可定制各种规格型号的产品。

Many materials can be choosed such as stainless steel 304L, 316L, Q345D etc.

According to customer requirements, we can customize various specifications and models product.