(1) Basic Parameter of Oil Discharge Valve
Glass observation mirror oil discharge valve
(2) Product Overview
Oil Discharge Valve
Oil Discharge Valve
Oil Discharge Valve
1
DN100 Sight Window Observation Oil Discharge Valve for Tanker Bottom Unloading
Our observation oil discharge valve is specially engineered for bottom fuel unloading on diesel and gasoline tank trucks, adopting standard DN100 flange specification to match mainstream tanker mounting ports. The built-in brass-ring sight glass enables direct real-time observation of internal fuel flow, letting operators spot pipeline blockage or abnormal leakage without disassembling the valve. Made of thick high-strength cast iron, its valve body resists long-term fuel corrosion and fluctuating working pressure. Ergonomic curved hand lever delivers smooth manual on-off operation, paired with precision internal sealing components to maintain zero leakage during continuous bulk oil discharge.
2
Heavy-Duty Visual Inspection Observation Oil Discharge Valve for Petrochemical Transport
This industrial-grade observation oil discharge valve serves large-capacity petrochemical and fuel transportation fleets with reliable DN100 large-caliber flow design for fast bulk oil draining. The exclusive observation mirror structure is its core highlight, allowing real-time flow monitoring to eliminate hidden operational faults effectively. Robust cast iron housing undergoes strict pressure testing during production to stand frequent open-close cycles, while reinforced spring lever structure prevents accidental valve loosening. Universal flanged connection cuts installation difficulty, widely compatible with various fuel tank trucks and bulk oil storage equipment globally.
3
Cost-Effective Leakproof Observation Oil Discharge Valve for Commercial Fuel Logistics
Designed for daily high-frequency fuel logistics work, the observation oil discharge valve with DN100 caliber balances high flow efficiency and practical visual inspection function perfectly. Its side-mounted sight glass with brass fitting delivers clear liquid observation to optimize unloading management and reduce unnecessary fuel waste. Precision-machined internal valve core and wear-resistant sealing gasket greatly extend service life against petrol and diesel erosion. Standardized flange interface supports quick replacement and aftermarket maintenance, a preferred unloading accessory for small filling stations, tanker operators and international fuel equipment wholesalers.
(3) Product Advantages
Our DN100 observation oil discharge valve is professional bottom unloading accessory customized for fuel tank trucks and petrochemical transportation, integrating visual sight glass inspection, large-flow delivery and reliable leakproof sealing. Standard DN100 flange connection matches most tanker equipment, widely used for gasoline and diesel bulk draining across global fuel logistics industries.
Built-in sight glass for real-time flow check & DN100 large bore for fast high-flow unloading on tankers.
Real-time Visual Monitoring with Sight Observation Window: The standout feature of this observation oil discharge valve is built-in sight glass with brass retainer ring. Operators directly check internal fuel flow status, quickly spot pipeline clogging, air bubbles or unexpected leakage without valve disassembly, greatly lowering hidden safety risks during oil unloading and improving on-site operation controllability.
DN100 Large Bore Delivers Efficient High-Flow Unloading: Equipped with standard DN100 wide caliber inner cavity, the observation oil discharge valve optimizes internal runner structure to boost fuel passing volume remarkably. It drastically cuts bulk gasoline and diesel unloading time for tankers, improving vehicle turnover efficiency for fleets and fuel depots compared to small-size conventional drain valves.
Robust cast iron for corrosion & pressure resistance; ergonomic lever plus standard flange for easy fitting and operation.
Heavy Cast Iron Body for Superior Anti-Corrosion & Pressure Resistance: Main body is cast from thick high-strength nodular cast iron, effectively resisting chemical corrosion from petrol, diesel and regular fuel additives. Strict factory pressure endurance testing ensures the observation oil discharge valve stably bears variable working pressure, coping with frequent daily open-close operations for long service lifespan.
Ergonomic Hand Lever + Standard Flange for Easy Installation & Operation: Curved labor-saving manual lever with reinforced spring assembly enables effortless smooth opening and closing to avoid accidental shutoff. Universal DN100 flange bolt layout fits mainstream tanker bottom interfaces for fast mounting and convenient later maintenance, supporting quick part replacement for global aftermarket customers.
(4) Installation System
Step By Step Installation Process
Prep Check: Clean tanker flange port, remove dirt/residual fuel, inspect valve gaskets and bolt accessories intact.
Position Mounting: Align the DN100 valve flange with tanker bottom unloading flange, place sealing gasket between two flanges to prevent leakage.
Bolt Fastening: Insert matching bolts into flange holes, tighten crosswise evenly to avoid uneven gasket compression and oil seepage.
Lever & Auxiliary Check: Confirm hand lever swings smoothly without jamming; inspect sight glass and side balance component fixed securely.
Pressure Test: Open lever slightly for trial fuel flow, check flange and observation window for no leakage to finish installation.
(5) About us
We own multiple independent patents and international compliance certificates for our observation mirror oil discharge valve series. All finished valves go through strict factory pressure resistance and fuel compatibility testing to meet global industry standards, and our patented structural design delivers consistent stable unloading and leakproof performance. Verified certifications help our observation mirror oil discharge valve smoothly clear customs and gain market access for tanker and gas station equipment importers around the world.
Our automated production workshop is equipped with precision machining and automated assembly production lines, covering integrated manufacturing for the observation mirror oil discharge valve and full pump-meter refuel assemblies. Every valve component undergoes full in-house machining from raw cast iron casting to finished assembly, enabling rigorous full-process quality inspection to stabilize flow precision, shell tightness and leak-proof performance of the observation mirror oil discharge valve. With complete independent production capacity, we support large-batch bulk wholesale as well as personalized customized dimension & structural orders of oil discharge valves and matched fuel dispenser spare parts, serving global gas station operators, fuel equipment manufacturers and tanker aftermarket distributors worldwide. 
We are a leading manufacturer of special trucks, tankers, trailers, and spare parts in China Welcome to visit us in Suizhou city, the production base of Chinese special purpose vehicles
T/T 30-50% as deposit, and the rest before delivery. We'll show you the photos of the products and packages before you pay the balance.
EXW, FOB, CFR, CIF, DAF, DDU.
Generally, it will take 20 to 30 days after receiving your advance payment. The specific deliver time depends on the items and the quantity of your order.
Yes. We have professional R&D team, we can produce the product exactly according to your requirements.
We are direct sales from the factory, so the price is very competitive. Different products have different prices. The price also depends on your special needs. To know the exact price, please contact us!
Yes, we have 100% test before delivery.
We provide lifelong tracking service and one year free warranty for all of our products.Meanwhile we provide free training and technical support to quide you repair your product. lf you need, we will also supply original spare parts and you just need to pay the freight
