Door and window sealing strips are commonly used in building doors and windows curtain wall, such as glass and beading, glass and fan, frame and fan and other joint parts. The design idea is to achieve the sealing effect of doors and windows through extrusion deformation, for air, liquid, dust, etc. Form a barrier to achieve door and window insulation, sound insulation, warmth, dust, water and other effects. Therefore, the door and window sealing strip should have good resilience, sealing and weather resistance, so as to have the effects of heat insulation, sound insulation, dustproof and waterproof.
Although the door and window seals have a small specific gravity, the effect cannot be underestimated. Inferior door and window seals are not only environmentally friendly, they contain odors that can cause damage to your body and pollute the air. At present, the main products of sealing strips commonly used in aluminum alloy doors and windows are: PVC, EPDM, thermoplastic elastomer (TPV), silicone rubber, etc., each with its own advantages and inferior quality.
First, PVC sealing strip
Performance: The environment is polluted during production, the product has poor weather resistance, and the comprehensive physical and mechanical properties are poor. It will harden, shrink and crack when exposed to low temperature. Can be welded.
Specific gravity: high-grade 1.5g/cm3; mid-range 1.6g/cm3; low-grade 1.7g/cm3.
Service life: 1-3 years. Since PVC products contain halogens and stabilizers contain heavy metals, they are not environmentally friendly. Therefore, PVC strips have been eliminated or restricted in developed countries and domestic coastal cities.
Recommended index: not recommended.
Second, EPDM (EPDM) door and window sealing strip
Performance: It has good weather resistance, ozone resistance and aging resistance; better comprehensive physical and mechanical properties; it is also very good for photooxidation. Not tinted, not solderable.
Specific gravity: 1.3-1.35g/cm3
Service life: more than 20 years, the product is environmentally friendly, the product construction is simple, and the anti-seepage, leak-proof and water-stopping effects are good.
Recommended index: Recommended for general projects in non-cold areas.
Third, TPV (thermoplastic elastomer) door and window sealing strip
Performance: Excellent anti-ozone and weathering resistance; better comprehensive physical and mechanical properties, also excellent for photooxidation. Can be tinted and can be welded.
Specific gravity: 1.05-1.15g/cm3
Service life: 25 years or more
Recommended index: Recommended for cold areas.
Fourth, silicone rubber door and window sealing strip
Performance: superior ozone and weather resistance; excellent elasticity and good compression deformation; color and high color fastness. Not solderable.
Specific gravity: 1.18-1.25g/cm3
Service life: more than 50 years.
Recommended index: recommended for use in severe cold areas/high-end projects. 
Editor in charge: Wang Zhen
HH High Head Horizontal Slurry Pump
1. Naipu HH serieshorizontal slurry pump are designed to produce high head per stage at high pressures.
commonly used for long distance transport lines, the NP-HH lines can
often satisfy application duties with a single pump where others require
multiple pumps.the range is capable of handling medium size particles
and pumping at heads in excess of 90 meters per stage.
Typical Applications---
Tailings Delivery
Cyclone Feed
Diamond Concentrate
Slag Granulation
Bottom Boiler and Fly Ash
Mill Discharge
2.Construction drawing of HH series Horizontal Slurry Pump
3.Select chart of HH series horizontal slurry pumps
4.HH series slurry pump performance parameters
HH High Head Slurry Pump,HH Slurry Pump,High Head Pump,HH Pump
Shijiazhuang Naipu Pump Co., Ltd. , https://www.naipu-pump.com