1. Valve Comparison
Item SMC Ball Valve Stainless steel Valve PVC Valve
Types
Major S M C Stainless Steel, Polyvinyl Chloride(PVC)
Ingredients Rubber or Teflon
Manufacturing Heat Press Foaming Casting Work, Cut-off Casting Work, Cutting
Process Work, Finishing Work, Injection Molding
Process
Manufacturing Short Long Long
Time
(Simple Structure, (Complicated (Complicated Structure,
Process Simplification) Structure, Difficult to Difficult to
manufacture) manufacture)
Watertightnes Very High High Average
s Perfect watertight using Watertight by a ball Watertight by a ball
an O-ring and 2 and O-ring on the and O-ring on the
Teflon Sheets inside. But possible inside
to occur the problem
due to the wear of
the O-ring
Deformation No No Occurrence of
by Heat deformation by heat
(Almost no deformation (The valve is easily
occurs due to the deformed even at low
material of the heat due to the
thermo-hardening resin properties of the
- Excellent in heat typical material of the
resistance) thermoplastic resin-
remarkably low in heat
resistance
Harmful to Same material as water Harmless but Highly harmful to
human tank and harmless to potentially harmful human body by a large
human body depending on the amount of hazardous
material of internal substances emitted
2. coating agent from PVC itself.
Maintenance Almost no maintenance High maintenance High maintenance cost
required cost
(No maintenance (Steady maintenance (Frequent replacement
required as this is free required due to the required due to the
from rust, scale, etc.) rust etc. in the deformation by heat in
external valve) summer and freeze
and rupture in winter)
Item SMC Ball Valve Acid-Resistant Valve PVC Valve
Product Life Semi-permanent 3~4 years (Frequent 1~2 years (Depending
rust) on deformation by
heat)
Strengths Excellent in corrosion
resistance and strength
as it is made of SMC
material and no crack
occurred due to the
distinctive durableness
unique to SMC material
In addition to the No deformation due Goon in chemical
semi-permanent to the high heat resistance
material life, it is (Based on SUS316L)
designed to allow the (But, possible freeze
replacement of the and rupture in low
wear part only easily. temperature)
Easy maintenance,
repair, etc.
Good in chemical
resistance and
abrasion resistance. No
freeze and rupture.
Lower in price Lower in price
compared to stainless compared to stainless
steel products (Refer steel products
to the price list
enclosed)
3. Low construction Low construction cost
cost as its weight is as its weight is lighter
lighter than metal than metal products.
products.
Weakness Requires large direct Deformation occurred Low in heat and cold
investment costs for by high heat in case resistance
making molds as it is of SUS304
a molded product Expensive and low High in gas
in corrosion permeability
resistance
Rust when left Strength becomes
unattended for a long weak when exposed to
time the nature
Difficult to install or High specific gravity
replace due to the
heavy weight of
product
No part level Harmful to human
replacement possible body (use a plasticizer
and it requires to and stabilizer)
replace the entire
valve even when only
a part is defective
High maintenance
costs due to short
product life
기타사항 Excellent in acid Decline of market Degradation of
resistance, chemical share Competitiveness
resistance, abrasion
Caused by an Caused by the
resistance, etc. and
expensive product occurrence of many
applicable to broad
price, management problems, etc.
and various fields such
issues, etc.
as water supplies,
Purification plants,
General chemistry
companies, drug use
pipelines, general
industrial water,
terminal disposal plants
of sewage, general
wastewater treatment
facilities, general
