Check valve, Reversing valve, Pressure reducing valve, Exhaust valve
1. Sanitary check valve
Sanitary check valve refers to a one-way anti-backflow valve, featuring no dead spaces, CIP/SIP compatibility, and 316L food and pharmaceutical grade
Equip with pipelines, fermentation tanks, sampling back-ends, and pure water/feed solution pipelines to prevent backflow contamination, material mixing, and sterilization backflow.
1.1 Welded check valve
1.2 Quick-installation check valve
1.3 Union check valve

Classified by operating conditions:
1. Quick-fit clamp vertical check valve
Structure: spring valve core + silicone/EPDM seal
Advantages: easy to install, no cleaning dead angles, quick to disassemble and assemble
Application: Pure water, chemical solution, cleaning solution, backflow prevention at the rear end of sampling pipeline
2. Horizontal pipeline sanitary check valve (straight-through type)
Structure: Piston/valve core direct flow
Advantages: low flow resistance, no material blockage
Application: Main pipeline for high-flow delivery, beverage, and dairy products
3. Diaphragm-type sanitary check valve (sterile high-end configuration)
Features: zero dead space, full evacuation, resistant to 135℃ steam SIP
Application: Biological fermentation, sterile preparations, vaccines/cell culture media (GMP high standard)
4. Welded check valve
 Features: Permanent sealing, no clamp gaps
Application: Pre-embedded pipelines in clean workshops, high-purity materials 
technical parameters
1. Material: Valve body made of 316L stainless steel (304 is strictly prohibited for sterile lines)
2. Internal polishing: Ra≤0.4~0.8μm (pharmaceutical industry ≤0.4, food industry ≤0.8)
3. Sealing: FDA-approved EPDM/PTFE/silicone rubber (resistant to steam aging)
4. Pressure: PN10/PN16 (sufficient for 6–10 bar)
5. Temperature resistance: -20℃~135℃ (compatible with sterilization steam in the workshop)
6. Connection: quick-fit clamp (3A/DIN/SMS), automatic welding, thread

advantage
Sampling valve rear end anti-backflow/pure water line clamp spring vertical check valve, compact and easy to install
Sterile liquid medicine/fermentation tank SIP pipeline, diaphragm sterile check valve, no fluid accumulation, complies with GMP standards
High-flow dairy/juice conveying horizontal straight-through check valve with low flow resistance and no blockage
High-purity long-term pipeline, welded sanitary check valve, no disassembly gaps, anti-bacterial

2. Sight Glass
2.1 Welded spherical sight glass
2.2 Welding mirror with wiper
2.3 Quick-installation pipeline inspection
The sanitary welded ball sight glass (also known as the spherical four-way sight glass) is a pipeline sight glass with welded connection and spherical shell, used in sanitary or industrial pipelines for real-time observation of fluid flow status.
1. Main structure
Body: 304/316L stainless steel precision-cast spherical shell, with butt welding connections on both sides.
Window: High borosilicate tempered glass (DIN 7080), resistant to temperature, pressure, and corrosion.
Sealing: Gaskets made of silicone rubber, EPDM, PTFE, etc., ensure no leakage.
Structure: Four-way structure, allowing 360° observation without dead angles, providing a wider field of view than straight-through sight glasses.
2. Main parameters
Diameter: DN15 ~ DN150 (1/2" ~ 6")
Pressure: PN6 ~ PN16 (0.6 ~ 1.6 MPa)
Temperature: -20℃ ~ +200℃ (for glass)
Connection: Welded
Standards: 3A, DIN, SMS, ISO, IDF, and other sanitary standards
3. Features and Advantages
Excellent field of view: spherical design, no blind spots, clear observation.
Sanitary and clean: no dead spaces, easy to clean, and complies with food/pharmaceutical GMP requirements.
Firm connection: welding method, high strength, no leakage, shock resistance.
Durable and robust: constructed of stainless steel and tempered glass, it is suitable for harsh working conditions.
Flexible installation: It can be installed horizontally or vertically.
4. Typical applications
Food and beverage: beer, dairy products, beverage pipelines.
Pharmaceutical biology: active pharmaceutical ingredient, injection water, CIP/SIP system.
Fine Chemicals: Cosmetics, Fragrances, High-Purity Fluids。

2.2  Quick-installation pipeline observation cup

The quick-mount pipeline sight glass (also commonly known as quick-mount glass tube sight glass) is a clamp-type transparent sight glass used in sanitary pipelines for 360° observation of medium flow. The core consists of a straight-through glass tube and a quick-mount chuck structure.

1. Structure and composition
• Body: 304/316L stainless steel quick-release chuck (both ends)
• Viewing window: High borosilicate tempered glass tube (360° full-circumference view)
• Sealing: Silicone, EPDM, PTFE gaskets (hygienic and no dead space)
• Connection: Tri-Clamp, no tools required, can be disassembled and assembled by hand

II. Specification Parameters
Path diameter: DN15 ~ DN100
Temperature: -20℃ ~ +120℃
Standard: 3A, BPE (sanitary grade)
Length: Standard 100mm/150mm (can be customized for extension)
III. Core Features
360° panoramic observation: glass tube structure, no blind spots, no obstructions
Quick and convenient: clamp connection, extremely fast installation/disassembly/cleaning
Sanitary and clean: mirror polishing of the inner wall (Ra≤0.8μm), no dead spaces, easy for CIP/SIP
Transparent and intuitive: It allows for observation of flow, bubbles, liquid level, impurities, and cleaning effect
Low pressure application: mainly used in low pressure sanitary pipelines for food, pharmaceuticals, beverages, etc

3.1 Manually solder the reversing valve
3.2 Manual quick-release pressure reducing valve
3.3 Flange sterilization filter
3.1 The sanitary manual welding reversing valve is a stainless steel, welded, manually operated two-position three-way/four-way flow switching valve, specifically designed for sanitary pipelines in food, pharmaceutical, and other industries. Its core features are dead-angle-free sealing and welded fixation.
1. Components
Valve body: precision-cast from 304/316L stainless steel, featuring L-shaped / T-shaped flow channels (tee / cross)
Connection: two-end/multi-end butt welding interface (welded connection, no leakage)
Operation: Operate the manual handle/handwheel to rotate and drive the valve core (ball core/plunger)
Sealing: EPDM, silicone, PTFE, sanitary grade with no dead spaces
Valve core: spherical / double-seat sealing, 360° rotary switching of flow passage
2. Technical parameters
Path diameter: DN15 ~ DN100
Pressure: PN1.0 MPa (10 bar)
Temperature: -20℃ ~ +150℃ (depending on the sealing component)
Material: SS304 / SS316L
Surface: Internal polishing Ra≤0.8μm (GMP)
Structure: L-type (diverging), T-type (converging/reversing)
Standards: DIN, SMS, 3A, ISO, IDF
3. Operating principle (L-type / T-type)
L-type (two-position three-way)
Handle 0°: A→B is open, C is closed
Handle 90°: A→C open, B closed
Purpose: One inlet and two outlets for flow distribution, pipeline switching
T-type (three-position three-way)
Median: A, B, C are interconnected (confluent)
Left position: A→B is open, C is closed
Right position: A→C is open, B is closed
Purpose: Two-in-one-out confluence, bidirectional switching
4. Characteristic advantages
Welding sealing: zero leakage, high strength, shock resistance, permanent fixation
Hygienic and no dead spaces: mirror polishing of the inner wall, no residue retention, easy for CIP/SIP cleaning
Reliable manual operation: No need for air/power supply, intuitive operation, and simple maintenance
Smooth flow channel: low pressure drop, self-cleaning, suitable for viscous/particulate media
Corrosion resistance: 316L+PTFE, suitable for acids and alkalis, food, and pharmaceutical solutions

Food and beverage: dairy products, beer, fruit juice, syrup, edible oil pipeline switching
Pharmaceutical biology: injection water, purified water, drug solution, CIP/SIP circuit
Fine Chemicals: Cosmetics, Essence, High-Purity Fluids, Coatings
Water treatment: Reversal of directions before and after filtration systems, reverse osmosis, and ultrafiltration equipment
4.1 Pin rotary cleaning ball
4.2 Dual chuck cleaning ball
4.3. Ox horn cleaning ball
5.1 Atmospheric manhole
5.2 Pressure manhole
5.3 Quick-fit respirator6.1 Quick-assembly ball filter
6.2 Quick-assembly Y-type filter
6.3 Quick-installation automatic exhaust valve



If you have any questions, please feel free to call for consultation,
pangjun@costones.com
























 

Suzhou COSTONES Instruments Co., Ltd. (COSTONES) is an instrument company focusing
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