Gtg Light Transmission Hole

• Media: Water
• Standard: Water Vapour Oil
• Certification: CCC, RoHS, ISO, CE
• Temperature: High Temperature
• Connection: Flange
• Valve Seat: Double-Seat
• Model NO.: GTG
• Structure: Piston
• Material: Cast Iron
• Transport Package: Wooden Box
• Specification: DN15-DN800
• Trademark: XC
• Origin: China
• HS Code: 8421219990
• Production Capacity: 9999

Product Description

Product Name:	Light hole	Product model:	GTG, GDG
Nominal diameter:	DN500 to DN600	Function Function:	Lighting or ventilation
Nominal pressure:	0.6 MPa	Connection method:	Flat welded flange
Applicable temperature:	-28ºC to +60ºC	Installation position:	Tank tip
Body material:	Carbon steel, stainless steel	Manufacturing standards:	GB, German DIN, American API, ANSI
Applicable media:	Gasoline, diesel, kerosene, crude oil, toluene, etc	Manufacturer:	Xuan Cheng Valve Co., LTD

Product Description

GTG, GDG light holes are located on the top of the tank for lighting and ventilation when the oil tank is installed and cleaned. The light of the oil tank is set on the top of the tank, which is generally a round hole with a diameter of 500mm. Usually, the hole cover ring is tightly closed by bolts. When cleaning and repairing the oil tank, it is used for lighting, ventilation and exhaust gas. In addition, when the operating device of the safety valve fails, the steel cable tied to the light transmission hole can be used to open the safety valve. When only one light transmission hole is set up on the top of the tank, it should be located on the top of the oil inlet and outlet pipeline; When two light transmission holes are set up, the light transmission holes and manholes are symmetrically distributed along the circumference as far as possible for lighting and ventilation, and the oil storage tank manholes, but at least one light transmission hole is located near the tank top platform. The outer edge of the light transmittance hole should be 800~1000mm away from the tank wall. The upper part of the light transmittance hole is connected with the vent hole and is usually closed with the eye ring blind plate.

Outline structure diagram

 

Specification drawing number

Specifications	Drawing number	Weight (Kg table)
DN500-A	GTG-500A	45
DN500-B	GTG-500B	48
DN500-C	GTG-500C	20
DN500-D	GTG-500D	26
Note: According to user requirements can produce other "non-standard" products