Nordson Efd UV Dispenser Variseal Spring Energized Seals

• Material: PTFE/Peek/UHMW-PE
• Application: Valve
• Type: Shaft Seal
• Performance: High Pressure
• Shape: Round Shell+Spring
• Standard: Standard, Nonstandard
• Model NO.: walle spring seal
• Color: Clear, Black, White, Yellow, Gray, Brown, Gold
• Transport Package: Carton
• Specification: per your request
• Trademark: Walle Variseal
• Origin: Guangdong, China
• HS Code: 3926901000
• Production Capacity: 100, 000PCS/Month

Product Description

Dispensing Valve Spring Seal


The sealing ring is installed in the groove, the tension spring is pressed to form the outward tension, and the Hunan pan-plug seals to promote the sealing lip to adhere to the sealing groove. The tension spring supplies the elastic force to the sealing lip, which can compensate the sealing shell wear and fit. The partial pain of the part thus constitutes a seal from vacuum to low pressure. Other system pressures will assist the spring storage, and the plug seals the size of the seal ring. The greater the pressure, the more the seal lip fits the groove, thus forming a high pressure seal.

It is designed to dispense low to high viscosity gels from small to microliters to large continuous strips. The special feature of the design is that the spring-loaded fluoropolymer needle fill compensates for wear, which greatly reduces downtime. Since the needle closing device is located at the end of the dispensing valve, substantially no colloid remains in the valve body. The crisp colloidal cutting action results in a clean, smooth colloidal section.
The gel flow rate through the DV-09 valve depends on the opening time of the dispensing valve, the colloid pressure, the flow control adjustment, the dispensing line port diameter, and the colloidal viscosity.


Characteristics:
• Ideal for low viscosity liquid seals or very fine line dispensing
• The needle closure provides a straight shape at the end of the dispensing line
• Adjustable gel control
• Low maintenance costs
• Quick response
• No glue residue
• Actively shut down
• The number of dispensing speeds per minute exceeds 500 points
• Suitable for all Nordson ASYMTEK dispensing systems

Applicable colloid:
• UV curing adhesive
• Silicone oil
• Flux
• Ink
• Coagulant
• Solvent
• mercury

plastic seal jacket materials:

Material Code	Compound Features & Recommended Service			Chemical	Wear
10	Virgin PTFE, premium grade, excellent material for gases and cryogenic applications, excellent chemical resistance, FDA approved, API 6A qualified			E	P
9	Modified PTFE, improved creep and extrusion resistance, excellent for static applications, low gas per_x005f_x005f_x005f_x0002_meability, good cryogenic properties, moderate to high vacuum service, FDA approved, API 6A qualified			E	F
16	Fiber Glass/Moly filled, excellent wear and creep resistance, good abrasion resistance for sealing non_x005f_x0002_lubricated media, good extrusion resistance, highly wear resistant blend, API 6A qualified			E	E
15	Carbon/Graphite filled, suitable for dynamic sealing of steam and water as well as poorly lubricated, recommended for dry or insufficiently lubricated applications, API 6A qualified			E	E
21	Graphite filled, very low coefficient of friction, good for water service, excellent for dry or poorly lubricated applications, API 6A qualified			E	F
6	Carbon Fiber filled, excellent wear and creep resistance, good electrical conductivity, good in water service, API 6A qualified			E	E
80	Mineral filled, used for sealing food products, good wear properties for both rotary and linear applications, FDA compliant material for sanitary food and pharmaceutical processing			G	G
88	Ekonol filled, good wear resistance but is not abrasive against non-hardened surfaces, should not be used in steam applications, best in dynamic applications running against soft metals			G	G
35	Stainless Steel filled, excellent material for steam service, good compression strength proportion along with better chemical resistance than bronze filled PTFE			F	G
1	Bronze filled, suited for high speed dynamic sealing of lubricating media, should not be used for chemical service			P	E
2	Polyimide filled, excellent wear resistance but not abrasive against non-hardened surfaces, should not be used in steam applications			G	E
24	Virgin PEEK, high strength material predominately used for anti-extrusion devices, such as back-up ring and support rings			G	G
23	Carbon Fiber filled PEEK, improved high temp properties, extremely rigid, high strength material used for back-up rings, guide rings, and support rings, API 6A qualified			G	G
22	PTFE filled PEEK, lower coefficient of friction than virgin PEEK, excellent high heat and wear resistance, chemically resistant to aggressive environments			G	E
26	UHMW, best material for reciprocating service in water or water based fluids, typically used for sealing food products, paints, adhesives , excellent wear and abrasion resistance			G	E
101	ETFE, melt processible fluoropolymer with good impact, abrasion and wear resistance, used in applica_x005f_x005f_x005f_x0002_tions where gamma radiation resistance is required, superior to nuclear radiation			F	E
E - excellent, G - good, F - fair, P - poor

Typical Spring Materials:

Material Code	Name	Description
A	301 Stainless Steel	Good corrosion resistance for general applications
B	Inconel 718	For extreme temperatures. Good resilience and tensile properties.
C	Elgiloy	The most resilient spring. Excellent chemical compatibility and corrosion resistance.Meets N.A.C.E. MR-01-75
D	Hastelloy C-276	High nickel content for maximum corrosion resistance. Meets N.A.GE. MR-01-75
E	304 Stainless Steel	Meets N.A.C.E. MR-01-75. Good for general applications requiring corrosion resistance and non-magnetic characteristics
F	17-7 PH Stainless Steel	Good for cryogenic applications. Used in many military-aerospace requirements.
G	316 Stainless Steel	A good corrosion resistant alloy for applications requiring higher chemical compatibility
H	302 Stainless Steel	Typical non-magnetic 300 series stainless steel

Walle have many years production experience and industry field application experience, we aimed at the different harsh sealing environments and developed various of materials suitable for applications. Improving all customers profit and saving all customers cost. Walle automatic production equipments and advanced testing equipments provide a strong guarantee for the manufacture of high quality Spring seals made of PTFE products.
Any questions please do not hesitate to contact me. It is our pleasure to be on service of you!          

Dongguan Walle Sealing Technology Development Co., Ltd
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URL: walleseals.en.made-in-china.com