1. Brief introduction of product:Vent holes arranged in the oil tank from the top of respiration and provides enough ventilation to the tank; at the same time it has the overflow protection effect on the condition of accident, ensuring the intact and fire safety of oil reservoir.
2. Product parameters:
A. Please point out name, specifications, pressure class, material, flange standards and so on.
B. The following is the detailed specifications:
3. Products picture:

规格	图号	安装尺寸(毫米)
		d	D	D1	d1	E	H	n
DN50	GTQ-50	ф54	ф110	ф140	ф14	ф200	186	4
DN100	GTQ-100	ф106	ф170	ф205	ф18	ф300	220	4
DN150	GTQ-150	ф151	ф225	ф260	ф18	ф450	283	8
DN200	GTQ-200	ф215	ф280	ф315	ф18	ф550	324	8
DN250	GTQ-250	ф265	ф335	ф370	ф18	ф600	378	12
DN300	GTQ-300	ф317	ф395	ф435	ф18	ф660	365	12