The 2-Valve Instrument Manifold – Direct Mount (Non-Flanged Transmitter) is a block-type manifold designed for direct installation on differential pressure transmitters without flange connection.
It integrates two isolation valves within a compact body to control the high-pressure and low-pressure impulse lines of the transmitter.
The manifold connects to the process through 1/2 NPT threaded ports and mounts directly to the transmitter interface, forming a compact impulse line assembly without additional tubing adapters.
A 1/4 NPT vent/test port is provided for pressure release, calibration, or test connection.
The structure is specifically designed for coplanar or similar non-flanged pressure transmitters, enabling stable mechanical installation and reliable pressure sealing between the process line and the instrument.
The integrated block design reduces connection points and improves installation integrity in pressure measurement systems.
| No. |
Component |
316 Stainless Steel (Material Grade / ASTM Spec.) |
Alloy C-276 (Material Grade / ASTM Spec.) |
| 1 |
Handle |
Aluminum Alloy |
Aluminum Alloy |
| 2 |
Set Screw |
304 Stainless Steel |
304 Stainless Steel |
| 3 |
Packing Gland |
304 Stainless Steel / A479 |
304 Stainless Steel / A479 |
| 4 |
Upper Valve Stem |
316 Stainless Steel / A479 |
304 Stainless Steel / A479 |
| 5 |
Lock Nut |
Stainless Steel |
Stainless Steel |
| 6 |
Bonnet |
316 Stainless Steel / A479 |
Alloy C-276 / B574 |
| 7 |
Packing Gland Ring |
316 Stainless Steel / A479 |
316 Stainless Steel / A479 |
| 8 |
Packing |
PTFE or Graphite |
PTFE or Graphite |
| 9 |
Groove Pin |
Stainless Steel |
Stainless Steel |
| 10 |
Lower Valve Stem |
Hardened 316 Stainless Steel / A479 |
Alloy C-276 / B574 |
| 11 |
Valve Body |
316 Stainless Steel / A479; 316 Stainless Steel / A182 |
Alloy C-276 / B564 |
| — |
Lubricant |
Molybdenum Disulfide-Based |
Molybdenum Disulfide-Based |
Features and Functions
- Two isolation valves for high- and low-pressure impulse lines
- Direct mounting to compact pressure transmitters
- Back-seat sealing in fully open position
- Non-rotating hardened lower stem design
- Screw-locked handle for vibration resistance
- Integrated vent/test port for calibration
- Thread lubrication isolated from process media
- Compact block-type manifold structure
Product Advantages
Improved sealing safety
Back-seat structure protects packing and prevents leakage during full opening.
Reduced stem wear
Non-rotating lower stem minimizes friction and extends service life.
Stable operation
Screw-locked handle prevents loosening under vibration or pulsation conditions.
Contamination-free sealing
Stem thread lubrication isolated from process medium ensures clean pressure transmission.
Compact installation
Direct mount structure reduces tubing connections and leak points.
This type of valve manifold is specially designed for Rosemount “coplanar” pressure transmitters (including models 3051C, 3051S, 2024 and 3095).
The standard configuration of each valve manifold of this model includes four 7/16″ UNF × 2.08″ high-strength bolts. It can be directly mounted to the transmitter.
Our Company Advantages
- 14+ years specialized in pressure testing and pneumatic boosting equipment R&D and manufacturing
- Annual production capacity exceeding 1000+ equipment sets
- Trusted by 8000+ global customers
- National High-Tech Enterprise with 28+ patents
- Engineering team with 10+ years industry experience
- Member of China Special Equipment Industry Association
- Member of National Instrumentation Standardization Committee
- 10+ years export experience in European and US markets
- ISO 9001 certified quality management system
- CE certified products for international compliance
- Focused on mid-to-high-end industrial instrumentation market
