Product Category

Fully Welded Felt Filter Bags

HL Filter offers a wide range of fully welded liquid filter bags designed and constructed to fit an assortment of filter vessels, whether from HL Filter or from another supplier. We manufacture our own felt media for our felt filter bags under 9001:2008 quality systems, resulting in order to order, year to year, reliability and repeatability. Each filter bag is also individually sealed in protective plastic packaging to prevent contamination. Our filter bags are silicone free with sturdy construction and easy installation.

Our fully welded felt filter bags feature with all seams and the collar are sonically welded (w/w/w construction), enhancing filtration quality, eliminating leaks and bypass that may have occurred with sewn seams. Welds are continuous, strong, consistent, and eliminate stray strands along the welds. Higher efficiency is due to tighter seal tolerances. The fused edges provide a fiber-free finish and virtually eliminate unwanted fiber migration.

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Product Description
Specifications
Applications
Ordering Information

Materials: Polypropylene, Polyester, Aramid, PTFE

Available micron rating range from 0.5-200 µ (for PE, PP), 5-150µ (Aramid), 10-50µ (PTFE)

Continuous operating temperature: PE: 265°F (130°C), PP: 194°F (90°C), Aramid: 400°F (204°C), PTFE:450°F (232°C)

Surface treatments available: signed and/or glazed to reduce the possibility of migration

Resistance to chemicals depends on the materials (please refer to Fiber Characteristics_Liquid Filtration)

Ring/side/bottom seal construction: w/w/w (fully welded)

Optional covers to eliminate fiber release and migration

Stable and flexible fully welded seams with no threads completely eliminate the possibility of unfiltered liquid bypass through needle holes

Higher efficiency due to tighter seal tolerances

Puncture free overlap side seams provide added strength and improves effluent consistency

Lower total costs due to higher particle loading capabilities

Reduced labor costs and disposal costs from fewer change-outs

Reduced product loss due to lower hold up volumes

All industry-standard #1,2,3,4 & custom sizes available

OEM replacement ring styles

Standard Needle Punched Felt Samples
Standard Needle Felt, Polypropylene (PP)
Part Number	Micron Rating	Weight oz/yd²±5% (g/m²±5%)	Thickness In±0.004 (mm±0.1)	Air Permeability CFM @ ½" W.G 125PA ±25% (L/dm²min @ 200PA ±25%)	Tensile Strength lb/in±25 (N/5CM±25%)		Max. Operating Temperature Continuous/Surge ^oF (^oC)
Part Number	Micron Rating	Weight oz/yd²±5% (g/m²±5%)	Thickness In±0.004 (mm±0.1)		Warp MD	Weft CD	Max. Operating Temperature Continuous/Surge ^oF (^oC)
PP-01	1	14.01 (475)	0.106 (2.7)	32(156)	69 (600)	91 (800)	194/230 (90/110)
PP-05	5	13.17 (450)	0.095(2.4)	55(270)	57 (500)	69 (600)	194/230 (90/110)
PP-10	10	10.91 (370)	0.091(2.3)	80(390)	57 (500)	69 (600)	194/230 (90/110)
PP-25	25	10.62 (360)	0.091(2.3)	123(600)	57 (500)	69 (600)	194/230 (90/110)
PP-50	50	10.32 (350)	0.091(2.3)	160(780)	57 (500)	69 (600)	194/230 (90/110)
PP-75	75	10.32 (350)	0.091(2.3)	172(840)	57 (500)	69 (600)	194/230 (90/110)
PP-100	100	9.73 (330	0.091(2.3)	252(1230)	46 (400)	57 (500)	194/230 (90/110)
PP-150	150	9.73 (330	0.091(2.3)	283(1380)	46 (400)	57 (500)	194/230 (90/110)
PP-200	200	9.44 (320)	0.091(2.3)	320(1560)	69 (600)	103 (900)	194/230 (90/110)
Standard Needle Felt, Polyester (PE)
Part Number	Micron Rating	Weight oz/yd²±5% (g/m²±5%)	Thickness Inch±20% (mm±20%)	Air Permeability CFM @ ½" W.G 125PA ±25% (L/dm2min @ 200PA ±25%)	Tensile Strength lb/in±25 (N/5CM±25%)		Max. Operating Temperature Continuous/Surge ^oF (^oC)
					Warp MD	Weft CD
PE-01	1	14.01 (475)	0.075 (1.9)	32(156)	114 (1000)	148 (1300)	265/302 (130/150)
PE-05	5	10.62 (360)	0.091 (2.3)	61(300)	57 (500)	114 (1000)	265/302 (130/150)
PE-10	10	10.62 (360)	0.087 (2.2)	82(400)	57 (500)	103 (900)	265/302 (130/150)
PE-25	25	10.62 (360)	0.095 (2.4)	123(600)	57 (500)	103 (900)	265/302 (130/150)
PE-50	50	10.62 (360)	0.102 (2.6)	164(800)	57 (500)	103 (900)	265/302 (130/150)
PE-75	75	10.62 (360)	0.098 (2.5)	184(900)	46 (400)	91 (800)	265/302 (130/150)
PE-100	100	10.62 (360)	0.114 (2.9)	205(1000)	46 (400)	91 (800)	265/302 (130/150)
PE-150	150	10.62 (360)	0.122 (3.1)	266(1300)	46 (400)	80 (700)	265/302 (130/150)
PE-200	200	10.62 (360)	0.126 (3.2)	307(1500)	46 (400)	74 (650)	265/302 (130/150)
Further technical data, modified surface treatments, and other micron ratings are available on request
Self-supported felts are standard. Scrim-supported felts are available on request

Technical data of Aramid Needle Felts and PTFE needle Felts are available on request

Automotive

Chemicals

Electronics

Petrochemical

Lubricating Oil

Paints and Coatings

Resins, Adhesives, and Inks

Toiletries and Cosmetics

Pharmaceuticals

Food and Beverages

Metalworking

Water treatment

Custom OEM Applications

How to order a felt filter bag
1) Material	2) Micron Rating	3) Finish	4) Size	5) Ring	6) Ring/side/bottom Construction
PE-Felt, Polyester	PE:0.5-200	PL-Plain	#1	S- Carbon Steel	WWW- Fully Welded
PP-Felt, Polypropylene	PP:0.5-200	SO-Singed One Side	#2	SS-Stainless Steel
NX-Felt, Aramid	NX: 5-150	SB-Singed Both Side	#3	Z- Zinc Galvanized Steel
PTFE- Felt, PTFE	PTFE:10-50	GL-Glazed	#4	P-Polypro PP Flange
		SG-Singed & Glazed		E-Polyester PE Flange
		HS-Heat Set		VS-High-temp Plastic Snap-seal
		MS-Special/modified		PP-Polypro Ring	7) Options
				PE-Polyester Ring	HS-Handle Strap (additional handle, same media)
				T-Titanium	A-Automotive (bottom and side seams inside bag)
				N-No Ring	MC- Mesh Cover
				MS-Modified/Special	SB-Spunbond cover
					SR-Special request


Other micron ratings, other sizes, and special design are available on request

Standard Bag Size	#1	#2	#3	#4
Surface Area	2.6 (0.24)	5.2 (0.48)	0.9 (0.08)	1.7 (0.16)
ft² (m²)
Volume	2.1 (7.9)	4.5 (17.0)		0.7 (2.7)
U.S gal (liter)			0.37 (1.4)
Max. Flow Rate	90 (20)	180 (40)	26 (6)	53 (12)
GPM (m³/h)
Bag Diameter	7.0 (180)	7.0 (180)	4.0 (105)	4.0 (105)
inch (mm)
Bag Length	17.0/430	32.0/810	9.0/230	15.0/380
Inch (mm)
Other Bag Size	Available upon request

Product Category

Fully Welded Felt Filter Bags

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