6 Inch Manual Double Disc Parallel Slide Gate Valve for Steam Pipeline

• Customization: Available
• Media: Oil, Natural Gas, Hydrogen
• Temperature: Ordinary Temperature
• Model NO.: Z944H-PN16
• Type: Parallel Slide, OS&Y, Bolted Bonnet
• Material: Carbon Steel
• Connection Form: Flange
• Pressure: Ordinary Temperature
• Actuator: Manual
• Seal Surface: Parallel Gate Valve
• Thread Position of Valve Rod: Outside Screw & Yoke
• Usage: Isolation
• Standard: ANSI
• Application: Industrial Usage
• Design: API 600
• Face to Face: ASME B16.10
• End Connection: ASME B16.5
• Inspection and Test: API 598
• Size Range: 2′′-42′′
• Pressure Rating: 150lb- 2500lb
• Bonnet Type: Bolted Bonnet
• Body: Wcb
• Trim: 13cr
• Warranty Time: 120 Days After Shipment
• Certificates: API 6D, CE, ISO9001, EAC 010/032, API 607, Sil, Is
• Transport Package: Plywood Case
• Specification: 6′′
• Trademark: Jitai
• Origin: China
• HS Code: 8481804090
• Production Capacity: 1000 Sets Per Month
• Package Size: 65.00cm * 30.00cm * 30.00cm
• Package Gross Weight: 60.000kg

Product Description

 

Product Description

Introduction

Parallel slide gate valve consists of two parallel discs, which are linked by the valve stem to achieve synchronous lifting and lowering motion. The spring preload or top wedge mechanism (such as mechanical linkage or hydraulic balance) is used to force the disc to expand to both sides and press the valve seat when closing, thus improving the sealing performance.


Working principle

Parallel slide gate valve has dual-disc structure, and the closing parts are composed of discs, an expansion block, a wedge block, etc.;



When opening, due to the effect of the wedge surface, the sealing gate and the valve seat are first disengaged and then rise, which greatly reduces the friction between the sealing surfaces. Therefore, the torque is small, the operation is light, and the service life is long;

When closing, the pressure on the sealing surface can be increased due to the effect of the wedge surface of the expansion block. In addition, since the sealing disk is provided with a sealing disk sleeve in the axial position, when the expansion block is in effect, the sealing disk only expands left and right to increase the sealing force, and does not produce lifting and lowering movement, which reduces the friction between the sealing surfaces, further ensures the reliability of the seal, and extends the service life of the valve;



Features:
 

(1) Seat limit structure

When the valve trims is closed in place, the friction of the sealing surface when it is closed can be reduced;
 

(2) Valve stem to close design

 
After the valve stem is fully opened, the valve stem to close and contact with the valve seat to close effectively reduces the pressure of the medium on the packing, increases the service life of the packing, and can prevent the valve stem from flying out due to excessive medium pressure, completely eliminating safety hazards;
 

(3) Fireproof design

 
Compliance with API607 fireproof certification ,the valve seat adopts butt-welded cemented carbide (STL12#, Ni60 and other high-hardness and high-wear-resistant materials) to enhance the service life of the seal;  has passed;
 
(4) Sealing surface cleaning

The valve adopts a flat up and down structure. When the valve trim and the valve seat are opened and closed, the stains on the sealing surface will be scraped off, thereby protecting the reliability of the sealing surface.

Components and utility

Part No.	Part Name	Function Description
1	Valve body	Main structure containing internal components and connecting to pipelines. Flanged/threaded/welded ends for installation.
2	Sealing disc (Gate plate)	Dual parallel plates controlling flow by vertical movement; forms sealing interface with valve seats.
3	Expanding block	Pushes dics laterally via spring/mechanical force to enhance sealing against seats under low pressure.
4	Wedge block	Converts vertical stem motion into lateral gate displacement for self-energized sealing.
5	Valve stem	Transmits lifting force from actuator (manual/electric/pneumatic) to discs.
6	Baffle plate	Protects stem and guiding parts from direct media erosion.
7	Upper cover	Seals valve body top; supports stem and packing system.
8	Upper valve seat	Sealing surface paired with discs; critical for shut-off integrity.
9	Packing	Seals gap between stem and bonnet to prevent leakage.
10	Gland	Compresses packing and adjusts sealing force via jack bolts.
11	Jack bolt	Adjusts preload force on packing gland.
12	Nut	Secures bolted connections (e.g., body-bonnet joints).
13	Bracket	Supports actuators (electric/pneumatic) for automated control.

 

Scope

 

Nominal size	2"~48"(DN50~DN1200)
Nominal pressure	Class150~2500(PN10~PN420)
Standard:	API600, API603, ASME B16.34, ASME B16.25
Body material	Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel
End connection	RF, BW, RTJ,
Operation	Manual, Pneumatic, Electric, Hydraulic

 

Product Parameters

 

Company Profile

Jitai Valve Group is a genuine valve manufacturer.

 

• 7000-sqm factory
• 100 employees
• 5+ senior engineers
• 30+ design patents
• 2 million sets of valves delivered
• 20 million USD annual revenue

Since 1988, we have been expert in manufacturing a wide scope of industrial valves including:

 

• Ball valves
• Butterfly valves
• API valves
• Steam valves
• High temperature valves
• Power Plant valves

Our Advantages

 

1. Heavy-duty valve expert with proven expertise in harsh environment;
2. Stringent quality control and traceable reports to provide zero-defect products;
3. Rugged and durable configuration according to API, ASME, BS, JIS, EN standards;
4. All kinds of UG, PRO/E, Solidworks software simulations ensure the efficiency and robustness for tailored components;
5.  .

FAQ

1.Q:Are you are a trading company or manufacturer?
   A:We are a manufacturer with 7000-sqm factory and 100 employees.

2.Q: Can you provide the assembly drawing for confirmation ?
   A: Yes, we can give the relavant drawing within 24 hours.

3.Q: Can you do non destructive test for valve components ?
   A: Yes, we can perform radiographic testing, penetration testing, ultrasonic testing, magnetic particle testing, etc

4.Q: How can I vist you when I am in China?
   A: We are near the Wenzhou Airport. If you take a plane, it takes 2 hours to reach our factory from Shanghai, 2 hours from Guangzhou, 3 hours from Beijing.

5.Q: Can we take sample for quality check?
A: Definitely. You can advise the model number and we will prepare the sample within 7 days.

6.Q: How can I become your distributor or agent?
A: You can send your company profile and reference list to our sales manager.

7.Q: Can you help with site maintenance and commissioning?
A: Yes, we are glad to offer our assistance whenever you need it. We can send our after sales team to address the issue within 14 days