Silence Check Valve
①Without Noise Through Air
②Customized to Sustain 45KGY Gamma Sterilization
③Applied to Ventilators, Air Mattresses, Pharmaceutical Bags Etc.
④100% Inspection
Best Valve supplier That You Can Trust
1, 10,000 & 100,000 Grade Cleanroom
2, ISO9001 System, 100% Inspection, 0 complains with millions of valve using.
3, Bio-compatible Material PC Body+Silicone Seal; Or customized
4, Over hundreds of types for selection of Valve!
5, Material Selection of Chemical,Oil,Medicine,Acid,Alkaline,Ozone, Gas Resistent. Air & Liquid flow test data. Aging, lifetime, chemical resistent test data by JTSEIKO’s Lab.
Product introduction and features
Opening Pressure ≤2Kpa
Non-return under 200Kpa
Non-return under 2Kpa
100% Inspection for each valve
Rohs, Reach, Bio-compatible Material Certification
Without Harsh Noise
Model
picture
specification
size
DCJT038
ID:4mm
OD:5.5mm
BARB:7mm
Note:OEM & ODM services provided.
Product Solution List
number
Product Type
Advantage
03
Particles can pass through,Self-cleaning, installation easy,anti-backflow,Hundreds of plans to choose from.Often used for drainage, air refill.
04
Particles can pass through,Self-cleaning, installation easy, anti-backflow, Hundreds of plans to choose from.Often used for drainage, air refill.
07
The interface size can be freely selected and matched ( 1/8”,3/16”,1/4” ).The "in" and "out" directions can be optionally converted; Cracking Pressure Customized.
09
Cracking Pressure: 0-3kPa, Customized cracking pressure tolerance ±3kPa, high performance of vacuum sealing.
12
Quick connection, pressure resistance of 2mPa, effective pressure reduction, preventing backflow and siphoning, customized opening pressure, and protecting the safe use of equipment.
13
1、No leakage by reverse 300kPa without puncture 2、No leakage by reverse 38kPa after puncture 3、Smooth passage of instrumentssuch as sheaths and guide wires
14
1、Transmittance≤15% 2、No Decolorization 3、Cracking pressure ≤2kPa, no leakage in reverse 2kPa & 200kPa. Customized cracking pressure
18
Straight/Y/T/L shape connector；medical grade PP material, 100,000 grade clean-room production.
Customized services
Product & Mould Design
Mould Process
Quality Control
Mass Production
Why Choose Us
OEM & ODM project
Our service includes design, research & innovation, mould process, lab test, mass production and quality control etc.
Product Design
1, Professional designer for ODM work with 20 years' experience.
2, Review with customers together to meet market's request.
Mould & Product Process
1, CNC, Sodick EMD Machine, CMM of Serein to gurantee mould size.
2, Mould review with customer's engineer together to make sure details.
Labratory & Quality Control
1, Quality control by ISO9001 standards with first article inspection, patrol inspection every 2 hours, OQC, IQC, PPAP standards etc.
2, Lab test includes air/water flow, aging, chemical/UV/high & low tempreture resistent, vibration, tensile, etc.
Mass Production
1, 100% test for every product.
2, Automatic assembling and testing is widely used.
plastic materials Selection
Item
Plastic Material Specification
PC
1. Medical Using Mostly, with Bio-compatible Reports
Nylon66(PA66)
1.Tempreture durance from -40℃ to 120℃.
2.Good chemical & weather resistant.
3.Weakness:Absorb water .
ABS
1.Tempreture durance from -40℃ to 80℃.
2.Excellent dimensional stability.
3.Weakness: chemical & weather resistant.
PP
1.Tempreture durance from 0℃ to 80℃.
2.Good chemical resistant.
3.Weakness: poor weather resistant and low tempreture.
PVDF
1.Tempreture durance from -40℃ to 150℃.
2.Excellent chemical resistant.
3.Weakness: expensive.
Note: Contact our engineer to learn more about materials’ info, such as PVC, PE, PC, PMMA,POM, TPU etc.
Plant environment
diaphragm check valve
Diaphragm Check Valve FAQ (Simplified)
- How does the Diaphragm Check Valve work?
A: It achieves a one-way (check) function through tight contact between a flexible rubber diaphragm and the sealing surface inside the valve chamber. Forward flow pressure deflects the diaphragm to allow media passage; when flow stops or reverses, the diaphragm returns to its seat via elasticity and backpressure, preventing reverse flow.
- What are its key features?
A:
✅ Simple Structure: Compact design with minimal components for easy maintenance.
✅ Dual-Media Compatibility: Effectively seals both gases and liquids.
✅ Full Range of Specifications: Multiple models available for diverse applications.
✅ Cost Advantage: Higher cost-efficiency compared to other check valve types.
- What are the working pressure parameters?
A:Cracking Pressure: <2 kPa, enabling sensitive response in low-pressure differentials.
Back Pressure Rating: Standard models ≤300 kPa; select models ≤100 kPa, accommodating varied system requirements.
- Can materials be customized, and what are typical applications?
A:
Material Flexibility: Both the valve body and diaphragm can be customized (e.g., metal, engineering plastics, acid/alkali-resistant rubber) to suit corrosive, high-temperature, or specialized environments.
Applications: Ideal for water treatment, medical devices, chemical processing, and automation systems requiring reliable backflow prevention—especially in low-pressure gas or liquid control.